toto

players = {"Edowa43"}

minY = -1
maxY = 5

maxDistance = 10

sensor = peripheral.wrap("right")

loop = true
while loop==true do

  if (redstone.getInput("top") == true) then
    loop = false
  end

  open = false

  p = sensor.getPlayers()

  for j=1,#p do

    name = p[j].name

    found = false

    for i=1,#players do
      if (players[i] == name) then
        found = true
      end
    end

    if (found == true) then
      coord = sensor.getPlayerByName(name).all().position

      distance = coord.x*coord.x+coord.z*coord.z
      distance = math.sqrt(distance)

      if (distance < maxDistance) then
        print("distance OK"..coord.y)
        if (coord.y > minY) then
          print("Y test")
          if (coord.y < maxY) then
             print("Y ok")
             open = true
          end
        end
      end
    end
  end

  redstone.setOutput("back", open)

  sleep(0.2)
end