coalDrop

function drop_coal()
    coal = turtle.getItemCount()
    if(coal<10) then
        turtle.suckUp(55)
        turtle.drop(1)
    else
       turtle.drop(1)
    end
end

while true do
    if redstone.getAnalogInput('front')==0 then
        drop_coal()
        os.sleep(0.1)
    else
        os.sleep(0.3)
        print("wait 1")
    end
end