os.loadAPI("ocs/apis/sensor")
local s = sensor.wrap("back")
redstone.setBundledOutput("bottom", 0)
while true do

for key,value in pairs(s.getTargets()) do
  if value.Riding ~= nil then
   if value.Riding.Name == "Creeper" then

    print("Creeper")

   end
  end
 os.sleep(0.5)
end
end