how to make individual addressable led strip of 20 LED bulbs manually

hi.... how to make individual addressable led strip of 20 LED bulbs manually (mono color)

Use a 2811 chip. Normally these control three LEDs at the same time but you can make this just one with the right resistor.

Also you can connect the three outputs to three LEDs and save a bit on chips at the expense of slightly more complex software.