function _init()
  g=1
end

function _update()
  if (btn(2)) g+=1
  if (btn(3)) g-=1
end

function _draw()
  cls()
  circ(64, 64, 20, 7)
  x = 64 + cos(g()) * 20
  y = 64 + sin(g()) * 20
  line(64, 64, x, y)
  print(g)
end