Added missing files.

links/main.css

@@ -0,0 +1,3 @@
+body { margin:0px; padding:0px; overflow:hidden;}
+canvas:hover { cursor: crosshair;}
+#commander { background:black; padding:15px; position:fixed; bottom:30; color:white; left:30px; border:0; width:calc(100vw - 60px); font-family:courier; cursor:pointer;}

scripts/brush.js

@@ -0,0 +1,46 @@
+function Brush()
+{
+  this.position = new Position();
+  this.is_drawing = false;
+  
+  // Pointers
+  
+  this.pointers = [new Pointer(new Position(0,0))];
+  
+  this.add_pointer = function(pointer)
+  {
+    this.pointers.push(pointer);
+  }
+  
+  // Draw
+  
+  this.draw = function(e)
+  {
+    if(this.is_drawing === false){return;}
+    
+    this.position = new Position(e.clientX,e.clientY);
+    
+    for (i = 0; i < this.pointers.length; i++) {
+      this.pointers[i].draw();
+    }
+  }
+  
+  this.draw_start = function(e)
+  {
+    this.is_drawing = true;
+    
+    for (i = 0; i < this.pointers.length; i++) {
+      this.pointers[i].start();
+    }
+  }
+  
+  this.draw_stop = function(e)
+  {
+    this.is_drawing = false;
+    
+    for (i = 0; i < this.pointers.length; i++) {
+      this.pointers[i].stop();
+    }
+  }
+  
+}