     @y = 0
     @g = 9.8
 
-    F = 13
-    angle = 45.0
-    radian = angle*Math.PI/180
+  throw:(force, angle) ->
+    @force = force
+    @angle = angle
 
-    @dx = F/Math.cos(radian)
-    @dy = F/Math.sin(radian)
-
-  animate: ->
+    @calculate_initial_position()
     setTimeout (=> @draw_frame()), 150
 
   draw: ->

    @calculate_projection()

    setTimeout (=> @draw_frame()), 150

  calculate_projection:() ->
    @x += @dx


  draw_banana:(gorilla_x, gorilla_y) ->
    banana = new Banana(@context, gorilla_x+30, gorilla_y-30)
    banana.throw(30, 45)

class Banana
  constructor:(context, initial_x, initial_y) ->
