rednet.open("top")
local side = "back"
local password = "fgt"
local opentime = 5
while true do
x,y,z = rednet.receive()

if y == "o3" then
sleep(8)
rs.setOutput(side,true)
rednet.send(24,"o2")
rednet.send(23,"u1")
sleep(opentime)
rs.setOutput(side,false)
end
if y == "o4" then
sleep(2.5)
rs.setOutput(side,true)
rednet.send(24,"o2")
rednet.send(23,"u1")
sleep(opentime)
rs.setOutput(side,false)
end

end