rainbow.js shows an example of how to use the new arc() method

src/main/javascript/drone/rainbow.js

@@ -0,0 +1,32 @@
+load(__folder + "drone.js");
+/*
+  Creates a Rainbow
+*/
+Drone.extend('rainbow', function(radius){
+    if (typeof radius == "undefined")
+        radius = 12;
+    
+    this.chkpt('rainbow');
+    this.down(radius);
+    var colors = [blocks.wool.red,
+                  blocks.wool.orange,
+                  blocks.wool.yellow,
+                  blocks.wool.lime,
+                  blocks.wool.blue,
+                  blocks.wool.purple];
+
+    for (var i = 0;i < colors.length; i++) {
+
+        var bm = this._getBlockIdAndMeta(colors[i]);
+        
+        this.arc({
+            blockType: bm[0],
+            meta: bm[1],
+            radius: radius-i,
+            strokeWidth: 2,
+            quadrants: {topright: true,
+                        topleft: true},
+            orientation: 'vertical'}).right().up();
+    }
+    return this.move('rainbow');
+});

src/main/javascript/drone/test.js

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+load (__folder + "drone.js");
+
+Drone.prototype.testStrokeWidth = function(){
+    this.arc({
+        blockType: 42,
+        meta: 0,
+        radius: 8,
+        strokeWidth: 3,
+        quadrants: {topright:true},
+        world: this._getWorld()
+    });
+};