playerDet  = peripheral.wrap("bottom")

isOpen = false

while true do

if playerDet.isPlayersInRange(7) and isOpen == false  then
    redstone.setOutput("right", true)
    isOpen = true
    sleep(1)
    redstone.setOutput("right", false)

elseif playerDet.isPlayersInRange(7) == false and isOpen == true then
    redstone.setOutput("left", true)
    isOpen = false
    sleep(1)
    redstone.setOutput("left", false)
end

sleep(0.2)

end