Floorplan: Drawing Background Image with Room-Size

If you like to draw on a floorplan, you can use this simple trick:

3 columns:
[Length] (Number type)
[Wide] (Number type)
[Drawing] (Drawing type)

In [Drawing] you set the Initial Value =

99ccff is the HEX value for background color
000000 is HEX value for font color (just dummy)
?text=%20 is dummy text

I multiply the [Wide]*2 and [Length]*2 to get a bigger background image.

This is the result: