while(true) do
 if(redstone.getInput("bottom") == true) then
  redstone.setAnalogOutput("top",15)
  sleep(1)
  redstone.setAnalogOutput("top",0)
  redstone.setAnalogOutput("right",15)
  sleep(1)
  redstone.setAnalogOutput("right",0)
  sleep(0.2)
  redstone.setAnalogOutput("left",15)
  sleep(0.2)
  redstone.setAnalogOutput("left",0)
 end
 sleep(3)
end