Platform

term.clear()
term.setCursorPos(1,1)
print("how Long?")
a=tonumber(read())
term.setCursorPos(1,3)
term.clearLine()
print("how Wide?")
b=tonumber(read())
turtle.placeDown()
x=1
y=0
s=1
print("using slot " ..s)
  while y<b do
   y=y+1
        while x<a do
        x=x+1
                turtle.forward()
                turtle.placeDown()
                   if turtle.getItemCount(s)==0 then
                   s=s+1
         print("now using slot " ..s)
                   turtle.select(s)
                   end
end
x=1
q=tonumber(y)
                 if q%2==1 then
                        turtle.turnRight()
                        turtle.forward()
   turtle.placeDown()
                        turtle.turnRight()
                 elseif q%2==0 then
                        turtle.turnLeft()
                        turtle.forward()
   turtle.placeDown()
                        turtle.turnLeft()
                 end
end
term.clear()
term.setCursorPos(1,1)
print("done")