xmass tree rocket

tired of boring, religious stuff on the top of the xmass tree? me too. here's the rocket, with glowing exhaust, instead! :D

HW

• WS2812B programmable LEDs x4
• ESP-12 / NodeMCU board
• 2x AA battery holder
• 1x DC/DC step-up converter (from battery's 2.5-3V to 5V for µC)
• on/off switch

TODOs

• make top ferrying walls thicker, so that blue LEDs do not shine-through in the dark