--[[ SpawnerController ]]--
rednet.open("left")  -- turtle starts by idling until a rednet signal is received
id, message = rednet.receive()
if message == "stopfarm" then -- recognizes only id 20 and message startfarm
    if redstone.getOutput("bottom") == true then
        rednet.send(20, "stoped")
        rednet.close()
        redstone.setOutput("bottom", true)
        sleep(1)
        shell.run(shell.getRunningProgram())
    else
        rednet.send(20, "not running")
        rednet.close()
        sleep(1)
        shell.run(shell.getRunningProgram())
    end
elseif message == "startfarm" then -- recognizes only id 20 and message startfarm
    if redstone.getOutput("bottom") == false then
        rednet.send(20, "started")
        rednet.close()
        redstone.setOutput("bottom", true)
        sleep(1)
        shell.run(shell.getRunningProgram())
    else
        rednet.send(20, "running")
        rednet.close()
        sleep(1)
        shell.run(shell.getRunningProgram())
    end
elseif message "status" then -- another alternative command that should tell the status of the turtle
    if redstone.getOutput("bottom") == false then
        rednet.send(20, "inactive")
        rednet.close()
        sleep(1)
        shell.run(shell.getRunningProgram())
    else
        rednet.send(20, "active")
        rednet.close()
        sleep(1)
        shell.run(shell.getRunningProgram())
    end
end