Christmas LED Ring Oscillator using NPN and MOSFET transistors

Here is a simple three LEDs ring oscillator replaced NPNs with the MOSFETs. Use all LEDs with the same current or same type (color). RGB led will not work as you can expect.

Schematic:

LED ring oscillator using NPN and MOSFET transistors

Update.

Two LEDs oscillator based on 2n3904 transistors and LDR

LDR light sensitive switch

Here is a simple solution when you need to power off your circuit by light. It works!