Quarry

	quarry = [[
  ____
 / __ \__ _____ ___________ __
/ /_/ / // / _ `/ __/ __/ // /
\___\_\_,_/\_,_/_/ /_/  \_, /
                       /___/
By: ppdonut
Version 1.1
]]
io.write(quarry)
io.write("width: ")
width = io.read()
io.write("length: ")
length = io.read()
io.write("depth: ")
depth = io.read()
io.write("Underground? (y/n): ")
underground = io.read()

widthInt = tonumber(width)
lengthInt = tonumber(length)
depthInt = tonumber(depth)
w = 1
h = 0
l = 1
y = 0
gravel = true
last = false
done = false
under = 0

trash = {"minecraft:cobblestone", "minecraft:stone", "minecraft:sand", "minecraft:gravel", "minecraft:dirt", "minecraft:mossy_cobblestone"}

function mine(x)
    i = 1
    while(i < x) do
        turtle.dig()
		while(gravel == true) do
			if(turtle.detect()) then
				turtle.dig()
			else
				gravel = false
			end
		end
		gravel = true
        turtle.forward()
        turtle.digUp()
		if(last == false) then
        	turtle.digDown()
		end
        i = i + 1
		l = l + 1
    end
end

function mineDown()
	i = 0
	while(i < 3) do
		if((depthInt - h) == 0) then
			last = true
			break
		end
		turtle.digDown()
		turtle.down()
		i = i + 1
		h = h + 1
	end
end

function turn()
	if(w % 2 == 0) then
		turtle.turnRight()
		mine(2)
		turtle.turnRight()
		l = 1
	else
		turtle.turnLeft()
		mine(2)
		turtle.turnLeft()
		l = 1
	end
end

function throwTrash()
	i = 1
	l = 1
	y = 0
	while(i <= 16) do
		while(l <= 6) do
			io.write(turtle.getItemDetail(i))
			if(turtle.getItemDetail(i) == table.tostring(trash[l])) then
				turtle.dropDown(i)
			elseif(turtle.getItemDetail(16) >= 5) then
				up(h + under)
				turtle.back()
				while(turtle.getItemDetail(16) ~= nil) do
					os.sleep(1)
				end
				turtle.forward()
				while(y < h + under) do
					turtle.down()
					y = y + 1
				end
			end
			l = l + 1
		end
		i = i + 1
	end
end

function quarry()
	while(w < widthInt) and (l < lengthInt) do
		mine(lengthInt)
		turn()
		w = w + 1
	end
	w = 1
	l = 1
	turtle.turnRight()
	turtle.turnRight()
	throwTrash()
	mineDown()
end

function up(x)
	i = 0
	while(i < x) do
		turtle.up()
		i = i + 1
	end
end

if(underground == "y" or underground == "Y") then
	turtle.digDown()
	turtle.down()
	turtle.digDown()
	turtle.down()
	turtle.digDown()
	turtle.down()
	turtle.digDown()
	under = 3
end

while(done == false) do
	if(depthInt - h == 0) and (l == 1) and (w == 1) then
		up(h + under)
		turtle.back()
		done = true
	else
		quarry()
	end
end