shell.run("clear")
print("Samen in Slot 1 einlegen")
print("")
print("Treibstoff in Slot 16 einlegen")
print("")
print("Habe " .. turtle.getFuelLevel() .." Treibstoff")
print("")
print("Soll ich tanken?")
print("Ja / Nein")
print("")

Tanken = io.read()

if Tanken == "Ja" then
  shell.run("refuel all")
  shell.run("clear")
else
 print("")
 print("Kein Tanken erforderlich")
 shell.run("clear")
end


print("Wie lang ist das Feld?")
b1 = io.read()
print("")
print("Wie breit ist das Feld?")
a1 = io.read()
print("")

a = a1+0
b = b1+0
c = a1+1

while a > 0 do

  while b > 0 do
    turtle.digDown()
    turtle.select(1)
    turtle.placeDown()
    b = b-1
    turtle.forward()
  end

  a = a-1
  b = b1+0

  turtle.turnRight()
  turtle.forward()
  turtle.turnRight()
  turtle.forward()

  while b > 0 do
    turtle.digDown()
    turtle.placeDown()
    b = b-1
    turtle.forward()
  end

  a = a-1
  b = b1+0

  turtle.turnLeft()
  turtle.forward()
  turtle.turnLeft()
  turtle.forward()
end

turtle.turnLeft()
while c > 0 do
  turtle.forward()
  c = c-1
end
turtle.back()
turtle.turnRight()