diff --git a/geo.js b/geo.js
index 2d5f41b..8d23385 100644
--- a/geo.js
+++ b/geo.js
@@ -41,6 +41,12 @@ class basicShape{
     ctx.stroke(this.shape);
     ctx.restore();
   }
+
+  draw(color){
+    let ctx = this.layer.getContext('2d');
+    ctx.fillStyle = color; 
+    ctx.fill(this.shape);
+  }
 }
 
 class tandemClass extends basicShape{
@@ -54,11 +60,6 @@ class tandemClass extends basicShape{
     this.shape.arc(xy[0], xy[1]-w/2 - l, w/2, Math.PI, 2* Math.PI);
   }
   
-  draw(color){
-    let ctx = this.layer.getContext('2d');
-    ctx.fillStyle = color;    
-    ctx.fill(this.shape);
-  }
   
 }
 
@@ -117,12 +118,6 @@ class beamRectElement extends basicShape{
     this.exitPos = [xy[0], xy[1] - l]
   }
 
-  draw(color){
-    let ctx = this.layer.getContext('2d');
-    ctx.fillStyle = color; 
-    ctx.fill(this.shape);
-  }
-
 }
 
 class beamCircleElement extends basicShape{
@@ -142,12 +137,6 @@ class beamCircleElement extends basicShape{
     let l = [r*Math.cos(rad), r*Math.sin(rad)];
     return [xy[0] + l[0], xy[1] + l[1]]; 
   }
-
-  draw(color){
-    let ctx = this.layer.getContext('2d');
-    ctx.fillStyle = color; 
-    ctx.fill(this.shape);
-  }
 }
 
 class BeamSpilter extends basicShape{
@@ -185,11 +174,28 @@ class BeamSpilter extends basicShape{
     let l = [this.r*Math.cos(rad), this.r*Math.sin(rad)];
     return translate(this.entracePos, l);
   }
+}
 
-  draw(color){
-    let ctx = this.layer.getContext('2d');
-    ctx.fillStyle = color; 
-    ctx.fill(this.shape);
+class dipole extends basicShape{
+  constructor(xy, r, rad){
+    super(staticLayer);
+    
+    this.entracePos = xy;
+
+    let A = [xy[0] + r/2, xy[1]];
+    let B = [A[0] , A[1] - r*3/2*Math.tan(rad/2)];
+    let C = [xy[0] - r - r*3/2 * Math.cos(rad), xy[1] - r*3/2 * Math.sin(rad)];
+    let D = [xy[0] - r - r/2 * Math.cos(rad), xy[1] - r/2 * Math.sin(rad)];
+    let F = [xy[0] - r/2, xy[1]];
+    let E = [xy[0] - r/2, xy[1] - r/2*Math.tan(rad/2)];
+
+    this.shape.moveTo(A[0], A[1]);
+    this.shape.arcTo(B[0], B[1], C[0], C[1], r*3/2);
+    this.shape.lineTo(D[0],D[1]);
+    this.shape.arcTo(E[0], E[1], F[0], F[1], r/2);
+    this.shape.lineTo(A[0], A[1]);
+
+    this.exitPos = [(C[0] + D[0])/2, (C[1] + D[1])/2];
   }
 
 }
@@ -213,9 +219,9 @@ let color = {
 
 ///========================= Sand Box;
 
-//let windowSize = [staticLayer.width, staticLayer.height];
+const deg = Math.PI/180;
+
 let windowSize = [3840, 2160]; // 4K
-//let windowSize = [2000, 1000];
 
 let RFSource1 = new beamRectElement([windowSize[0]*0.9, windowSize[1]*0.8], 0, 40, 100);
 let RFSource2 = new beamRectElement(RFSource1.exitPos, 0, 40, 20);
@@ -226,13 +232,19 @@ let b1S = new beamLine(RFSource2.exitPos, 0, 200);
 
 let tandem = new tandemClass(b1S.exitPos, 100, 100);
 
-let b10 = new beamLine(tandem.exitPos, 0, 100); b10.offset = 8;
-let b10a = new beamLine(b10.exitPos, 0, 400); b10a.offset = 11;
+let bl0 = new beamLine(tandem.exitPos, 0, 300); bl0.offset = 8;
+let bl0a = new beamLine(bl0.exitPos, 0, 400); bl0a.offset = 11;
 
 let q1 = new beamRectElement(tandem.GetExitPos(50), 0, 60, 60);
 let df1 = new beamRectElement(q1.GetExitPos(50), 0, 30, 40);
 let df2 = new beamRectElement(df1.GetExitPos(20), 0, 30, 40);
 
+//============ beam line for target room 1
+let d1 = new dipole(bl0.exitPos, 80, Math.PI/2);
+
+let bl1 = new beamLine(d1.exitPos, -Math.PI/2, 100);
+let bfan1 = new BeamSpilter(bl1.exitPos, 50, -100 * deg);
+
 
 
 RFSource1.draw(color.RFsourcce[0]);
@@ -240,22 +252,23 @@ RFSource2.draw(color.RFsourcce[0]);
 b1S.draw(color.BeamPipe[0]);
 s1.draw(color.Dipole[0]);
 tandem.draw(color.Tandem[0]);
-b10.draw(color.BeamPipe[0]);
-b10a.draw(color.BeamPipe[1]);
+bl0.draw(color.BeamPipe[0]);
+bl0a.draw(color.BeamPipe[1]);
 q1.draw(color.Qpole[0]);
 df1.draw(color.Deflector[0]);
 df2.draw(color.Deflector[0]);
 
-
-
-
+d1.draw(color.Dipole[0]);
+bl1.draw(color.BeamPipe[0]);
+bfan1.draw(color.Dipole[0]);
 
 
 
 function lineMotion(){
   b1S.march('red');
-  b10.march('red');
-  b10a.march('red');
+  bl0.march('red');
+  //bl0a.march('red');
+  bl1.march('red');
   setTimeout(lineMotion, 20);
 }
 lineMotion();