--stairs

function moveLeft(blocks)
	turtle.turnLeft()
	for i=1,blocks do
		turtle.forward()
	end
	turtle.turnRight()
end

function moveRight(blocks)
	turtle.turnRight()
	for i=1,blocks do
		turtle.forward()
	end
	turtle.turnLeft()
end

function moveUp(blocks)
	for i=1,blocks do
		turtle.up()
	end
end

function moveForward(blocks)
	for i=1,blocks do
		turtle.forward()
	end
end

function buildSide(height, amount)
	for i=1,height do
		for j=1,amount do
			turtle.place()
			moveLeft(1)
		end
		moveRight(amount)
		moveUp(1)
		moveForward(1)
	end
end

function ready(amount)
	turtle.forward()
	turtle.turnLeft()
	for i=1,amount-1 do
		turtle.forward()
	end
end

function main(amount, width, length, height)
	for i=1,height,2 do
		buildSide(width, amount)
		ready(amount)
		buildSide(length, amount)
		ready(amount)
	end
end

print("amount")
local amount = tonumber(read())
print("width")
local width = tonumber(read())
print("length")
local length = tonumber(read())
print("height")
local height = tonumber(read())

print("amount="..amount)
print("width="..width)
print("length="..length)
print("height="..height)

main(amount, width, length, height)