Computer Craft: 9x9 DESTROYER

function digDown()
 if turtle.detectDown() == true then
  turtle.digDown()
 end
end

function digforward()
 if turtle.detect() == true then
  turtle.dig()
 end
end

function forward()
 digDown()
 digforward()
 turtle.digDown()
 turtle.forward()
 sleep(0.5)
end

function line()
 for x=1,8 do
  forward()
 end
end

function startingpos()
 turtle.up()
 sleep(0.5)
 turtle.forward()
end

function layer()
 line()
 turtle.turnRight()
 line()
 turtle.turnRight()
 line()
 turtle.turnRight()
 line()
 turtle.turnRight()
end

function walls()
 turtle.select(1)
 layer()
 turtle.up()
 layer()
 turtle.up()
 turtle.select(2)
 layer()
 turtle.up()
 layer()
 turtle.up()
 turtle.select(3)
 layer()
end

function floorpos()
 turtle.forward()
 sleep(0.5)
 turtle.turnRight()
 sleep(0.5)
 turtle.forward()
 sleep(0.5)
 turtle.turnLeft()
 sleep(0.5)
 for x=1,5 do
  turtle.down()
  sleep(0.5)
 end
end

function floorline()
 for x=1,6 do
  digDown()
  turtle.digDown()
  turtle.forward()
  sleep(0.5)
 end
end

function right()
 turtle.turnRight()
 digDown()
 turtle.digDown()
 sleep(0.5)
 turtle.forward()
 sleep(0.5)
 turtle.turnRight()
 sleep(0.5)
end

function left()
 turtle.turnLeft()
 digDown()
 turtle.digDown()
 sleep(0.5)
 turtle.forward()
 sleep(0.5)
 turtle.turnLeft()
 sleep(0.5)
end

function floor()
 turtle.select(4)
 floorline()
 right()
 floorline()
 left()
 floorline()
 right()
 floorline()
 left()
 floorline()
 right()
 floorline()
 left()
 floorline()
end

function roofpos()
 digDown()
 turtle.digDown()
 turtle.turnRight()
 sleep(0.5)
 turtle.turnRight()
 sleep(0.5)
 for x=1,5 do
  turtle.up()
  sleep(0.5)
 end
end

function rooflineglass()
  turtle.select(5)
  digDown()
  turtle.digDown()
  turtle.forward()
  sleep(0.5)
  turtle.select(6)
  digDown()
  turtle.digDown()
  turtle.forward()
  turtle.select(6)
  digDown()
  turtle.digDown()
  turtle.forward()
  sleep(0.5)
  turtle.select(5)
  digDown()
  turtle.digDown()
  turtle.forward()
  turtle.select(6)
  digDown()
  turtle.digDown()
  turtle.forward()
  sleep(0.5)
  turtle.select(6)
  digDown()
  turtle.digDown()
  turtle.forward()
  sleep(0.5)
  turtle.select(5)
  digDown()
  turtle.digDown()
end

function roofline()
 for x=1,6 do
  turtle.select(5)
  digDown()
  turtle.digDown()
  turtle.forward()
  sleep(0.5)
 end
end

function roof()
 roofline()
 right()
 rooflineglass()
 left()
 rooflineglass()
 right()
 roofline()
 left()
 rooflineglass()
 right()
 rooflineglass()
 left()
 roofline()
end

function gohome()
 digDown()
 turtle.digdown()
 turtle.forward()
 sleep(0.5)
 turtle.turnRight()
 sleep(0.5)
 turtle.forward()
 sleep(0.5)
 turtle.turnLeft()
 sleep(0.5)
 turtle.forward()
 sleep(0.5)
 for x=1,5 do
  turtle.down()
 end
 print("9x9 DESTROYED!")
end

print("Welcome to norway240's 9x9 House DESTROYER!")
print("please wait while this turtle demolishes the existing 9x9")

startingpos()
walls()
floorpos()
floor()
roofpos()
roof()
gohome()