Ive got some 4017's, would I be able to add those to this for any additional effect or control?The network of LEDs D9-D20 remains unchanged. Just modify each 555 to look like this...
Of course, the LED color is up to you. You can also use one fixed resistor instead of the variable. You can buy Darlington transistors prepackaged, no need to use 2 transistors unless they are in the junk box.