cog.p8

pico-8 cartridge // http://www.pico-8.com
version 16
__lua__
function sleep(s)
  for i=1,s*30 do
    flip()
  end
end

c = 0
function _update()
 c += 1
 if c > 4 then c = 1 end
end
states = {
 {20,19,false,true},
 {19,19,true,true},
 {19,20,true,false},
 {20,20,false,false}
}
function _draw()
  cls()
  -- pole
  spr(4, 20, 20)
  spr(4, 20, 14)
  -- shadow
  spr(3, 20, 20)

  -- valve
  spr(
   1,
   states[c][1],
   states[c][2],
   1,1,
   states[c][3],
   states[c][4]
  )

  -- hilight
  spr(2, 20, 20)
  print(c)
  sleep(.2)
end
__gfx__
00000000000004400000000000000000022212000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
00000000004444400090000000000000012221000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
00700700044044000900000000010000022212000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
00077000040404000000000000101000012221000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
00077000044044000000000000010000022212000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
00700700004440000000000000000100012221000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000111000022212000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000012221000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000