I made these widgets with Randy Hoyt's wonderful RotateContent.com.
Here is the 200-pixel-wide version (good for blog sidebars):
And here is the 400-pixel-wide version:
If you are using an old http version of the script:
The old version will continue to run, but you will see that it displays an alert about needing to switch to https, and I won't be updating it with new pictures. I will only be updating the https version from now on.