function _init()
  -- always start on white
  col = 7
end
 
function _update()
  -- press x for a random colour
  if (btnp(5)) col = 8 + rnd(8)
end
 
function _draw()
  cls(1)
  circfill(64,64,32,col)
  spr(1,64,64, 2,2)
end