local success, findCoal = 1

function refuel()
    if turtle.getFuelLevel() < 200 then
        print("refueling now... I can only move ", turtle.getFuelLevel(), "more blocks...")
        turtle.select(1)
        while turtle.select("minecraft:coal") == false do
            findCoal = findCoal + 1
            turtle.select(findCoal)
        end
        print("I found coal in slot ", turtle.select(), ". Eating it now!")
        turtle.refuel()
        print("done! I can now move ", turtle.getFuelLevel(), "more blocks!")
    else
        print("I dont need fuel right now! I can still move ", turtle.getFuelLevel(), " more blocks!")
    end
end

refuel()