Ok, this one's pretty simple to explain It's logic gates. So those operators you see on Scratch. You know, And, Or, Not? Yeah, that's this These also allow for Not And (NAND), Not Or (NOR), Excluding Or (XOR) and Excluding Nor (XNOR) I have also included pixel art versions of the logic gate's symbols, just for extra detail really though.
As with most of these converters, credits go to griffpatch for the text engine.