21-Bars 74/m LED Master Panel

The Columns will use the 2812B LED strips (74 leds per meter) spaced 8.5mm between the LEDs. Flex LED strips will be cut in sections of 20 LEDs each segments and added to each Column then solder each end to the 3-pin terminal. See attachments. This is for 74/m strips that you can but from BTF-Lighting.com or Aliexpress .. Is possible to add acrylic blocks on TinkerCad, some shops will CO2 laser  cut it for you for a fee .. https://www.tinkercad.com/things/2hoQpGJdcPV-panel-array-25x9x30/edit