sensor.lua

mon = peripheral.wrap("monitor_23")

ps = peripheral.wrap("playerSensor_1")
local player = "null"
local range = 1

function check()
pstable = ps.getNearbyPlayers()
mainps = pstable[1]
player = mainps.player
range = mainps.distance
mon.clear()
if range < 10  then
mon.setCursorPos(1,1)
mon.write("hello "..player)

end
sleep(1)
end

while true do
check()

sleep(1)

end