redBucket

p=peripheral.wrap("left")

function redBucket()
    if p.getStackInSlot(1) ~= nil then
        if p.getStackInSlot(1)["display_name"] == "Bucket" then
            redstone.setAnalogOutput("left", 15)
            sleep(1)
            redstone.setAnalogOutput("left",0)
            print("Bucket Filled")
        end
    else
        redstone.setAnalogOutput("front", 15)
        sleep(1)
        redstone.setAnalogOutput("left",0)
    end
end

while true do
    sleep(1)
    redBucket()
end