I opened a browser window and couldn’t figure out how to run the code, so I poked around and found developer tools(I aint, but I seen it done once 
and how about that, there is console with the little >
I get “true” for little-endian.
dmesg reports that I have an intel processor.
As to why blendMode() doesn’t seem to make any difference, you will need to add another sphere inside the other by adjusting the size by 1 or 2 and put an image on it just like is done for alphatest.png . Both images probably need to be the same dimensions. I seem to remember getting screwy results until I used equal image sizes. You will also need to add some code to rotateX, rotateY with the mouse if you want to see different views, etc. The code I posted above is still rather large when it is best to post minimal code to illustrate a problem.