print("Laenge eingeben: ")
l = tonumber(read())

print("Breite eingeben: ")
b = tonumber(read())

print("Tiefe eingeben: ")
t = tonumber(read())

right = true

function forward()
  while(not turtle.forward()) do
    turtle.dig()
  end
end

function down()
  while(not turtle.down()) do
    turtle.digDown()
  end
end

function turn()
  if(right) then
    turtle.turnRight()
  else
    turtle.turnLeft()
  end
end

for y=1,t do
  for z=1,b do
    for x=1,l-1 do
      forward()
    end
    turn()
    if(z ~= b) then
      forward()
    end
    turn()
    right = not right
  end
  if(y ~= t) then
    down()
  end
  right = not right
end