Place Holder Images Featuring Molly the Bunny Rabbit Occasionally Joined by Oscar as a Service (PHIFMtBROJbOaaS)
set image source to:
/IMAGE_WIDTHxIMAGE_HEIGHT.FORMAT
Where:
or grayscale:
/g/IMAGE_WIDTHxIMAGE_HEIGHT.FORMAT
For example /200x300.png gives you this:
And /g/300x200.png gives you this: