Prepare four LED strips with different length, so you have variation with the lights..
Cut small holes in the pocket, so we could hide the wires.
Attach the LED strip with Hot Glue
Easily plug in the connector to Grove Joint 2.0, the LiPo battery is already attached inside.
Then we just need to flash the below program to Grove Joint 2.0. Switch power on, the beautiful lights work like a charm.