For Computer Craft users Cobble generator Program

print("Diging Cobblestone")

function dig()
while true do
turtle.dig()
sleep(0.2)
end
end

function refuel()
while true do
shell.run("refuel all")
sleep(0.1)
end
end
function drop()
drop = 0
while true do
for i = 1,16 do

drop = drop + 1
if drop == 17 then
drop = 1
end
turtle.select(drop)
icount = turtle.getItemCount()
if icount >= 1 == true then
local item = turtle.getItemDetail()
if item.name == "minecraft:coal" == false then
turtle.drop()
end
end
end
end
end


parallel.waitForAll(dig,drop,refuel)