local Laenge = 0
local a = true
term.clear()
term.setCursorPos(1,1)
textutils.slowPrint("######################################")
textutils.slowPrint("###X x 3 bridge builder activitated###")
textutils.slowPrint("######################################")
print("Please put floor material in slot 2!")
print("Please put side material in slot 3!")
write("How long should the bridge be?")
Laenge = read()
for a = 0, Laenge do
 turtle.turnRight()
 turtle.select(2)
 turtle.placeDown()
 turtle.forward()
 turtle.placeDown()
 turtle.forward()
 turtle.placeDown()
 turtle.forward()
 turtle.placeDown()
 turtle.forward()
 turtle.placeDown()
 turtle.forward()
 turtle.placeDown()
 turtle.forward()
 turtle.placeDown()
 turtle.forward()
 turtle.placeDown()
 turtle.forward()
 turtle.placeDown()
 turtle.forward()
 turtle.turnLeft()
 turtle.placeDown()
 turtle.forward()
 turtle.turnLeft()
 turtle.select(2)
 turtle.placeDown()
 turtle.forward()
 turtle.placeDown()
 turtle.forward()
 turtle.placeDown()
 turtle.forward()
 turtle.placeDown()
 turtle.forward()
 turtle.placeDown()
 turtle.forward()
 turtle.placeDown()
 turtle.forward()
 turtle.placeDown()
 turtle.forward()
 turtle.placeDown()
 turtle.forward()
 turtle.placeDown()
 turtle.forward()
 turtle.turnRight()
 turtle.placeDown()
 turtle.forward()
end
term.clear()
term.setCursorPos(1,1)
turtle.select(1)