My checker-7

function menu()

monitor.setBackgroundColour((colours.lime))
monitor.clear()
monitor.setCursorPos(20,5)

if redstone.getInput("right", true) then -- rechts = bartna
right = "Online"
else
right = "Offline"
end
if redstone.getInput("back", true) then -- achterkant = 123kac
back = "Online"
else
back = "Offline"
end
if redstone.getInput("front", true) then -- voorkant = alexmaster50
front = "Online"
else
front = "Offline"
end
if redstone.getInput("left", true) then -- left = ewart4fun
left = "Online"
else
left = "Offline"
end

monitor.write(" Player Bartna = " .. right)
monitor.setCursorPos(20,8)
monitor.write(" Player 123kac = " .. back)
monitor.setCursorPos(20,11)
monitor.write(" Player Alexmaster50 = " .. front)
monitor.setCursorPos(20,14)
monitor.write(" Player Ewart4fun = " .. left)
end


monitor = peripheral.wrap("monitor_1")

monitor.clear()

monitor.setCursorPos(1,1)

monitor.setBackgroundColour((colours.blue))

menu()

monitor.setBackgroundColour((colours.lime))

function aardappel()
menu()
sleep(3)
aardappel()
end

aardappel()
os.reboot()