Extremely Simple 3x3 ladder+tower builder

term.clear()
term.setCursorPos(1,1)
print("This program builds a ladder on a flat 3x3 surface surounded by a shell in the following format at a height of ur choosing.")
print("Press any button to continue")
os.pullEvent(key)
term.clear()
term.setCursorPos(1,1)
print("use the following format and fill your slots. A,S = your own Block choice. X= Ladder suportable block  L=ladder and S=startpoint")
term.setCursorPos(1,6)
print("AXA")
print("ALA")
print("SAA")
print("How high do you want to go?")
h=tonumber(read())
x=0
	while x<h do
	x=x+1


turtle.up()
if turtle.getItemCount(7)>0 then
turtle.select(7)
turtle.placeDown()
end
turtle.forward()
if turtle.getItemCount(4)>0 then
turtle.select(4)
turtle.placeDown()
end
turtle.forward()
if turtle.getItemCount(1)>0 then
turtle.select(1)
turtle.placeDown()
end
turtle.turnRight()
turtle.forward()
turtle.turnRight()
if turtle.getItemCount(2)>0 then
turtle.select(2)
turtle.placeDown()
end
turtle.forward()
turtle.forward()
if turtle.getItemCount(8)>0 then
turtle.select(8)
turtle.placeDown()
end
turtle.turnLeft()
turtle.turnLeft()
turtle.forward()
if turtle.getItemCount(5)>0 then
turtle.select(5)
turtle.placeDown()
end
turtle.turnLeft()
turtle.turnLeft()
turtle.forward()
turtle.turnLeft()
turtle.forward()
turtle.turnLeft()
if turtle.getItemCount(9)>0 then
turtle.select(9)
turtle.placeDown()
end
turtle.forward()
if turtle.getItemCount(6)>0 then
turtle.select(6)
turtle.placeDown()
end
turtle.forward()
if turtle.getItemCount(3)>0 then
turtle.select(3)
turtle.placeDown()
end
turtle.turnLeft()
	turtle.forward()
turtle.forward()
turtle.turnLeft()
turtle.forward()
turtle.forward()
turtle.turnLeft()
turtle.turnLeft()
end
turtle.back()
y=2
while y<h do
turtle.down()
end