diff --git a/src/main/angular/src/app/editor/Point.ts b/src/main/angular/src/app/editor/Point.ts
new file mode 100644
index 0000000..423d151
--- /dev/null
+++ b/src/main/angular/src/app/editor/Point.ts
@@ -0,0 +1,20 @@
+import {Junction} from "./junction/Junction";
+
+export class Point {
+
+  constructor(
+    readonly x: number,
+    readonly y: number,
+  ) {
+    //
+  }
+
+  static fromEvent(event: MouseEvent) {
+    return new Point(event.offsetX, event.offsetY);
+  }
+
+  static fromJunction(j: Junction) {
+    return new Point(j.pixelX, j.pixelY);
+  }
+
+}
diff --git a/src/main/angular/src/app/editor/breadboard/breadboard.component.html b/src/main/angular/src/app/editor/breadboard/breadboard.component.html
index 2657cad..60f69bf 100644
--- a/src/main/angular/src/app/editor/breadboard/breadboard.component.html
+++ b/src/main/angular/src/app/editor/breadboard/breadboard.component.html
@@ -1,4 +1,4 @@
-<svg class="breadboard">
+<svg class="breadboard" (mousemove)="mouseMove($event)" (mouseup)="mouseUp($event)">
 
   <svg *ngFor="let part of parts" [attr.height]="part.hP" [attr.width]="part.wP" [attr.x]="part.xP" [attr.y]="part.yP" [ngClass]="part.ngClass()">
 
@@ -6,27 +6,52 @@
 
     <ng-container *ngIf="isBattery(part)">
       <text dominant-baseline="hanging" text-anchor="middle" x="50%" y="3%">{{ asBattery(part).voltageStr }}</text>
-      <line class="wire" id="wireMinus" x1="15%" x2="40%" y1="50%" y2="50%"></line>
-      <line class="wire" id="wirePlus" x1="55%" x2="80%" y1="50%" y2="50%"></line>
+      <line class="partWire" id="wireMinus" x1="15%" x2="40%" y1="50%" y2="50%"></line>
+      <line class="partWire" id="wirePlus" x1="55%" x2="80%" y1="50%" y2="50%"></line>
       <rect height="30%" id="symbolMinus" width="10%" x="35%" y="35%"></rect>
       <rect height="60%" id="symbolPlus" width="5%" x="55%" y="20%"></rect>
       <text text-anchor="middle" x="50%" y="95%">{{ asBattery(part).currentStr }}</text>
     </ng-container>
 
     <ng-container *ngIf="isLight(part)">
-      <text dominant-baseline="hanging" text-anchor="middle" x="50%" y="3%">{{ asBattery(part).voltageStr }}</text>
+      <text dominant-baseline="hanging" text-anchor="middle" x="50%" y="3%">{{ asLight(part).voltageStr }}</text>
       <circle [attr.fill]="asLight(part).fill()" [class.defect]="asLight(part).defect" cx="50%" cy="50%" id="circle" r="35%"></circle>
       <g class="cross">
         <line id="lineLeftRight" x1="15%" x2="85%" y1="50%" y2="50%"></line>
         <line id="lineTopDown" x1="50%" x2="50%" y1="15%" y2="85%"></line>
       </g>
-      <text text-anchor="middle" x="50%" y="95%">{{ asBattery(part).currentStr }}</text>
+      <text text-anchor="middle" x="50%" y="95%">{{ asLight(part).currentStr }}</text>
     </ng-container>
 
-    <svg *ngFor="let j of part.junctions" [attr.height]="j.hP" [attr.width]="j.wP" [attr.x]="j.xP" [attr.y]="j.yP" class="junction">
-      <circle [attr.id]="'j' + j.name" cx="50%" cy="50%" fill="gray" r="35%"></circle>
+    <svg
+      *ngFor="let junction of part.junctions"
+      class="junction"
+      [attr.x]="junction.percentX + '%'"
+      [attr.y]="junction.percentY + '%'"
+      [attr.height]="junction.percentH + '%'"
+      [attr.width]="junction.percentW + '%'"
+      (mousemove)="mouseMove($event)"
+      (mousedown)="junctionMouseDown(junction, $event)"
+      (mouseenter)="junctionMouseEnter(junction, $event)"
+      (mouseleave)="junctionMouseLeave(junction, $event)"
+      (mouseup)="junctionMouseUp($event)"
+    >
+      <circle [attr.id]="junction.id" cx="50%" cy="50%" fill="gray" r="35%"></circle>
     </svg>
 
   </svg>
 
+  <ng-container *ngFor="let wire of wires">
+    <line class="wire" [attr.x1]="wire.start.pixelX + 'px'" [attr.y1]="wire.start.pixelY + 'px'" [attr.x2]="wire.end.pixelX + 'px'" [attr.y2]="wire.end.pixelY + 'px'"></line>
+  </ng-container>
+
+  <ng-container *ngIf="wireStart && wireCursor && wireStartJunction">
+    <ng-container *ngIf="wireEnd && wireEndJunction">
+      <line class="wire" [class.wireDuplicate]="wireEndDuplicate" [class.wireEnd]="!wireEndDuplicate" [attr.x1]="wireStart.x + 'px'" [attr.y1]="wireStart.y + 'px'" [attr.x2]="wireEnd.x + 'px'" [attr.y2]="wireEnd.y + 'px'"></line>
+    </ng-container>
+    <ng-container *ngIf="!wireEnd">
+      <line class="wire wireOpen" [attr.x1]="wireStart.x + 'px'" [attr.y1]="wireStart.y + 'px'" [attr.x2]="wireCursor.x + 'px'" [attr.y2]="wireCursor.y + 'px'"></line>
+    </ng-container>
+  </ng-container>
+
 </svg>
diff --git a/src/main/angular/src/app/editor/breadboard/breadboard.component.less b/src/main/angular/src/app/editor/breadboard/breadboard.component.less
index 1753674..33a3c51 100644
--- a/src/main/angular/src/app/editor/breadboard/breadboard.component.less
+++ b/src/main/angular/src/app/editor/breadboard/breadboard.component.less
@@ -8,9 +8,16 @@
   user-select: none;
 
   .part {
+
     .background {
       fill: lightgray;
     }
+
+    .partWire {
+      stroke-width: 5px;
+      stroke: black;
+    }
+
   }
 
   .part:not(:has(.junction:hover)):hover {
@@ -40,8 +47,23 @@
   }
 
   .wire {
-    stroke-width: 5px;
+    stroke-width: 9px;
     stroke: black;
+    stroke-linecap: round;
+    pointer-events: none;
+  }
+
+  .wireOpen {
+    stroke: blue;
+    stroke-dasharray: 5px 15px;
+  }
+
+  .wireEnd {
+    stroke: green;
+  }
+
+  .wireDuplicate {
+    stroke: red;
   }
 
   .junction {
diff --git a/src/main/angular/src/app/editor/breadboard/breadboard.component.ts b/src/main/angular/src/app/editor/breadboard/breadboard.component.ts
index dd7fe88..11d0333 100644
--- a/src/main/angular/src/app/editor/breadboard/breadboard.component.ts
+++ b/src/main/angular/src/app/editor/breadboard/breadboard.component.ts
@@ -3,6 +3,9 @@ import {NgClass, NgForOf, NgIf} from '@angular/common';
 import {Part} from '../parts/Part';
 import {Battery} from '../parts/battery/Battery';
 import {Light} from '../parts/light/Light';
+import {Junction} from '../junction/Junction';
+import {Wire} from '../wire/Wire';
+import {Point} from '../Point';
 
 @Component({
   selector: 'app-board',
@@ -16,11 +19,29 @@ import {Light} from '../parts/light/Light';
 })
 export class BreadboardComponent {
 
-  parts: Part[] = [
-    new Battery(1, 1, 3, 0.5),
-    new Light(1, 5, 3, 3, 0.5),
+  private battery = new Battery(1, 1, 3, 0.5);
+
+  private light = new Light(1, 5, 3, 1.5, 0.5);
+
+  protected readonly parts: Part[] = [this.battery, this.light];
+
+  protected readonly wires: Wire[] = [
+    new Wire(this.battery.minus, this.light.a),
+    new Wire(this.battery.plus, this.light.b),
   ];
 
+  protected wireCursor: Point | null = null;
+
+  protected wireStart: Point | null = null;
+
+  protected wireEnd: Point | null = null;
+
+  protected wireStartJunction: Junction | null = null;
+
+  protected wireEndJunction: Junction | null = null;
+
+  protected wireEndDuplicate: boolean = false;
+
   asBattery(part: Part): Battery {
     return part as Battery;
   }
@@ -37,4 +58,75 @@ export class BreadboardComponent {
     return part instanceof Light;
   }
 
+  mouseMove($event: MouseEvent) {
+    this.wireCursor = Point.fromEvent($event);
+  }
+
+  mouseUp($event: MouseEvent) {
+    if ($event.button === 0) {
+      this.wireReset();
+    }
+  }
+
+  junctionMouseDown(j: Junction, $event: MouseEvent) {
+    if ($event.button === 0) {
+      this.wireCursor = Point.fromEvent($event);
+      this.wireStart = Point.fromJunction(j);
+      this.wireStartJunction = j;
+    }
+  }
+
+  junctionMouseEnter(j: Junction, $event: MouseEvent) {
+    if ($event.button === 0 && this.wireStartJunction !== null) {
+      if (this.wireStartJunction === j) {
+        this.wireEndReset();
+      } else {
+        this.wireEnd = Point.fromJunction(j);
+        this.wireEndJunction = j;
+        this.wireEndDuplicate = this.wires.some(w => (w.start === this.wireStartJunction && w.end === this.wireEndJunction) || (w.start === this.wireEndJunction && w.end === this.wireStartJunction));
+      }
+    }
+  }
+
+  junctionMouseLeave(j: Junction, $event: MouseEvent) {
+    if ($event.button === 0 && this.wireStartJunction !== null && this.wireEndJunction === j) {
+      this.wireEndReset();
+    }
+  }
+
+  junctionMouseUp($event: MouseEvent) {
+    if ($event.button === 0) {
+      if (this.wireStartJunction !== null && this.wireEndJunction !== null) {
+        this.wireConnect(this.wireStartJunction, this.wireEndJunction);
+      }
+      this.wireReset();
+    }
+  }
+
+  private wireConnect(start: Junction, end: Junction) {
+    if (start === end) {
+      console.log("Not connecting junction with itself.");
+      return;
+    }
+    if (this.wireEndDuplicate) {
+      console.log("Not connecting duplicate wire.");
+      return;
+    }
+    const wire = new Wire(start, end);
+    console.log("Wire created: ", wire);
+    this.wires.push(wire);
+  }
+
+  private wireReset() {
+    this.wireStart = null;
+    this.wireStartJunction = null;
+    this.wireEndReset();
+  }
+
+  private wireEndReset() {
+    this.wireEnd = null;
+    this.wireEndJunction = null;
+    this.wireEndDuplicate = false;
+  }
+
 }
diff --git a/src/main/angular/src/app/editor/parseColor.ts b/src/main/angular/src/app/editor/colorHelpers.ts
similarity index 57%
rename from src/main/angular/src/app/editor/parseColor.ts
rename to src/main/angular/src/app/editor/colorHelpers.ts
index cb7bac9..48e5713 100644
--- a/src/main/angular/src/app/editor/parseColor.ts
+++ b/src/main/angular/src/app/editor/colorHelpers.ts
@@ -24,3 +24,13 @@ export function parseColor(color: string): { r: number; g: number; b: number } {
 
   return {r, g, b};
 }
+
+export function fadeGrayToYellow(factor: number, fromColor: any, toColor: any): string {
+  fromColor = parseColor(fromColor);
+  toColor = parseColor(toColor);
+  factor = Math.max(0, Math.min(100, factor));
+  const r = Math.round(fromColor.r + factor * (toColor.r - fromColor.r));
+  const g = Math.round(fromColor.g + factor * (toColor.g - fromColor.g));
+  const b = Math.round(fromColor.b + factor * (toColor.b - fromColor.b));
+  return `rgb(${r}, ${g}, ${b})`;
+}
diff --git a/src/main/angular/src/app/editor/fadeGrayToYellow.ts b/src/main/angular/src/app/editor/fadeGrayToYellow.ts
deleted file mode 100644
index 4b3dcbb..0000000
--- a/src/main/angular/src/app/editor/fadeGrayToYellow.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-import {parseColor} from './parseColor';
-
-export function fadeGrayToYellow(factor: number, fromColor: any, toColor: any): string {
-  fromColor = parseColor(fromColor);
-  toColor = parseColor(toColor);
-  factor = Math.max(0, Math.min(100, factor));
-  const r = Math.round(fromColor.r + factor * (toColor.r - fromColor.r));
-  const g = Math.round(fromColor.g + factor * (toColor.g - fromColor.g));
-  const b = Math.round(fromColor.b + factor * (toColor.b - fromColor.b));
-  return `rgb(${r}, ${g}, ${b})`;
-}
diff --git a/src/main/angular/src/app/editor/junction/Junction.ts b/src/main/angular/src/app/editor/junction/Junction.ts
index 44d4bf3..8c2adc1 100644
--- a/src/main/angular/src/app/editor/junction/Junction.ts
+++ b/src/main/angular/src/app/editor/junction/Junction.ts
@@ -2,28 +2,43 @@ export const JUNCTION_RADIUS_PERCENT = 15;
 
 export class Junction {
 
+  readonly id: string = self.crypto.randomUUID();
+
+  readonly percentX: number;
+
+  readonly percentY: number;
+
   constructor(
-    readonly x: number,
-    readonly y: number,
+    percentX: number,
+    percentY: number,
     readonly name: string,
   ) {
-    //
+    this.percentX = percentX - JUNCTION_RADIUS_PERCENT;
+    this.percentY = percentY - JUNCTION_RADIUS_PERCENT;
   }
 
-  get xP(): string {
-    return (this.x - JUNCTION_RADIUS_PERCENT) + '%';
+  private boundingBox(next: (b: DOMRect) => number): number {
+    const b = document.getElementById(this.id)?.getBoundingClientRect();
+    if (!b) {
+      return 0;
+    }
+    return next(b);
   }
 
-  get yP(): string {
-    return (this.y - JUNCTION_RADIUS_PERCENT) + '%';
+  get pixelX(): number {
+    return this.boundingBox(b => b.x + b.width / 2);
   }
 
-  get wP(): string {
-    return (JUNCTION_RADIUS_PERCENT * 2) + '%';
+  get pixelY(): number {
+    return this.boundingBox(b => b.y + b.height / 2);
   }
 
-  get hP(): string {
-    return (JUNCTION_RADIUS_PERCENT * 2) + '%';
+  get percentW(): number {
+    return (JUNCTION_RADIUS_PERCENT * 2);
+  }
+
+  get percentH(): number {
+    return (JUNCTION_RADIUS_PERCENT * 2);
   }
 
 }
diff --git a/src/main/angular/src/app/editor/parts/Part.ts b/src/main/angular/src/app/editor/parts/Part.ts
index 90ccd26..5797b00 100644
--- a/src/main/angular/src/app/editor/parts/Part.ts
+++ b/src/main/angular/src/app/editor/parts/Part.ts
@@ -1,51 +1,52 @@
-import {Junction} from '../junction/Junction';
 import {PartType} from './PartType';
+import {Junction} from '../junction/Junction';
 
 export const RASTER = 50;
 
 export abstract class Part {
 
   protected constructor(
-    readonly x: number,
-    readonly y: number,
     readonly type: PartType,
-    readonly junctions: Junction[],
-    readonly w: number = 3,
-    readonly h: number = 3,
+    readonly rasterX: number,
+    readonly rasterY: number,
+    readonly rasterW: number = 3,
+    readonly rasterH: number = 3,
   ) {
     //
   }
 
-  get xR(): number {
-    return this.x * RASTER;
+  abstract get junctions(): Junction[];
+
+  get x(): number {
+    return this.rasterX * RASTER;
   }
 
-  get yR(): number {
-    return this.y * RASTER;
+  get y(): number {
+    return this.rasterY * RASTER;
   }
 
-  get wR(): number {
-    return this.w * RASTER;
+  get w(): number {
+    return this.rasterW * RASTER;
   }
 
-  get hR(): number {
-    return this.h * RASTER;
+  get h(): number {
+    return this.rasterH * RASTER;
   }
 
   get xP(): string {
-    return this.xR + 'px';
+    return this.x + 'px';
   }
 
   get yP(): string {
-    return this.yR + 'px';
+    return this.y + 'px';
   }
 
   get wP(): string {
-    return this.wR + 'px';
+    return this.w + 'px';
   }
 
   get hP(): string {
-    return this.hR + 'px';
+    return this.h + 'px';
   }
 
   ngClass(): string[] {
diff --git a/src/main/angular/src/app/editor/parts/battery/Battery.ts b/src/main/angular/src/app/editor/parts/battery/Battery.ts
index f787c0b..0e5c7c0 100644
--- a/src/main/angular/src/app/editor/parts/battery/Battery.ts
+++ b/src/main/angular/src/app/editor/parts/battery/Battery.ts
@@ -5,21 +5,21 @@ import {siPrefix} from '../../siPrefix';
 
 export class Battery extends Part {
 
+  readonly minus: Junction = new Junction(15, 50, "-");
+
+  readonly plus: Junction = new Junction(85, 50, "+");
+
   constructor(
-    x: number,
-    y: number,
+    rasterX: number,
+    rasterY: number,
     readonly voltage: number,
     public current: number,
   ) {
-    super(
-      x,
-      y,
-      PartType.Battery,
-      [
-        new Junction(15, 50, "-"),
-        new Junction(85, 50, "+"),
-      ]
-    );
+    super(PartType.Battery, rasterX, rasterY);
+  }
+
+  override get junctions(): Junction[] {
+    return [this.minus, this.plus];
   }
 
   get voltageStr(): string {
diff --git a/src/main/angular/src/app/editor/parts/light/Light.ts b/src/main/angular/src/app/editor/parts/light/Light.ts
index f52d43a..777f0cf 100644
--- a/src/main/angular/src/app/editor/parts/light/Light.ts
+++ b/src/main/angular/src/app/editor/parts/light/Light.ts
@@ -2,26 +2,27 @@ import {Part} from "../Part";
 import {Junction} from '../../junction/Junction';
 import {PartType} from '../PartType';
 import {siPrefix} from '../../siPrefix';
-import {fadeGrayToYellow} from '../../fadeGrayToYellow';
+
+import {fadeGrayToYellow} from '../../colorHelpers';
 
 export class Light extends Part {
 
+  readonly a = new Junction(15, 50, "a");
+
+  readonly b = new Junction(85, 50, "b");
+
   constructor(
-    x: number,
-    y: number,
+    rasterX: number,
+    rasterY: number,
     readonly voltageMax: number,
     readonly voltage: number,
     public current: number,
   ) {
-    super(
-      x,
-      y,
-      PartType.Light,
-      [
-        new Junction(15, 50, "a"),
-        new Junction(85, 50, "b"),
-      ]
-    );
+    super(PartType.Light, rasterX, rasterY);
+  }
+
+  override get junctions(): Junction[] {
+    return [this.a, this.b];
   }
 
   get defect(): boolean {
diff --git a/src/main/angular/src/app/editor/wire/Wire.ts b/src/main/angular/src/app/editor/wire/Wire.ts
new file mode 100644
index 0000000..1645f6b
--- /dev/null
+++ b/src/main/angular/src/app/editor/wire/Wire.ts
@@ -0,0 +1,12 @@
+import {Junction} from "../junction/Junction";
+
+export class Wire {
+
+  constructor(
+    readonly start: Junction,
+    readonly end: Junction,
+  ) {
+    //
+  }
+
+}