previous projects, Multivibrator and 3x3 LED Matrix

I found same prviously completed projects, which i recorded, in the first video you can see a multivibrator, its LEDs aren't blinking in the same frequency  (They are blinking to fast to see that), this is a project which i would recommend to every electronics beginner.

In the second video you can see a 3x3 LED matrix, i made it right before i made the 5x2 RGB matrix, to control this matrix i used only PIC16F628A microcontroller, but i didin't try to save any pins of the PIC16F628A so i didn't use any additional microchips, like CD4017.

Here you can see the Multivibrator scheme.