2

rednet.open("top")

function rson()
rs.setOutput("back", true)
rs.setOutput("right", true)
rs.setOutput("left", true)
sleep(0.1)
rs.setOutput("back", false)
rs.setOutput("right", false)
rs.setOutput("left", false)
end

while true do
id, msg = rednet.receive()
if id == 15 then
if msg == "on" then
rson()
end
end