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Iconer can be used as a prank. All it does is on launch, it randomly pops thousands of B&W system icons to fill your desktop. You can stop it using CMD-Q.
Iconer.sit (7.71 KiB / 7.89 KB)
Iconer v1.0 / compressed w/ Stuffit
Mac OS 1.x - Mac OS 7.x
Emulating this? It should run fine under: Mini vMac