diff --git a/picogora.p8 b/picogora.p8
index 30ce8c8..1a46034 100644
--- a/picogora.p8
+++ b/picogora.p8
@@ -3,6 +3,8 @@ version 32
 __lua__
 -- game code
 
+bg = 12
+
 function init_world()
   player = {}
   player.x = 64
@@ -10,6 +12,10 @@ function init_world()
   player.spr = 1
 
   drops = {}
+  ramps = {}
+  add_ramp(50,20,15,10)
+  add_ramp(60,50,15,-15)
+  add_ramp(50,60,20,0)
 end
 
 function _init()
@@ -25,6 +31,15 @@ function _update()
   update_drops()
 end
 
+function add_ramp(x,y,dx,dy)
+  r = {}
+  r.x = x
+  r.y = y
+  r.dx = dx
+  r.dy = dy
+  add(ramps, r)
+end
+
 function update_player()
   if btn(0) then
     player.x -= 1
@@ -52,6 +67,7 @@ function update_player()
 end
 
 function update_drops()
+  draw_world()
   new_drops = {}
   for i=1,#drops do
     drop = drops[i]
@@ -64,12 +80,21 @@ function update_drops()
 end
 
 function _draw()
-  cls(blue)
-  foreach(drops, draw_drop) 
+  draw_world()
   spr(player.spr,player.x-1,player.y-1)
   print("drops: "..#drops, 1, 6, white)
 end
 
+function draw_world()
+  cls(bg)
+  foreach(drops, draw_drop)
+  foreach(ramps, draw_ramp)
+end
+
+function draw_ramp(r)
+  line(r.x,r.y,r.x+r.dx,r.y+r.dy,brown)
+end
+
 function draw_drop(drop)
   pset(drop.x, drop.y, white)
 end