local component = require("component")
local sides = require("sides")
local rs = component.redstone

while true do

::start::

rs.setOutput(sides.left, 15)

::loop::

os.sleep(2)

if rs.getInput(sides.back, 15) then
goto green
else
goto loop
end


::green::
rs.setOutput(sides.front, 15)
os.sleep(2)
rs.setOutput(sides.left, 0)
rs.setOutput(sides.front, 0)
rs.setOutput(sides.right, 15)



::loop1::

os.sleep(2)

if rs.getInput(sides.back, 0) then
goto red
else
goto loop1
end


::red::
rs.setOutput(sides.right, 0)
rs.setOutput(sides.front, 15)
os.sleep(5)
rs.setOutput(sides.front, 0)
goto start

end