First I made schematic then the PCB layout.
After selecting the microcontroller, I looked at the data heath on the controller and pinout. The microcontroller needed a sleep mode and at least 4 I / O pins for 3 mosfets, one for each color (red, yellow, green) and one push button. Attiny85 was perfect.
Pin1 (RESET) – is a reset pin, where I connected a 10 kOhmPULL UP resistor (package 1206)
Pin2 – I used this button for the push button, every time I pressed the
Pin3 – button in SCH1 I connected this pin to the male head but I didn't use it.
Pin4 – Ground  Pin5 (MOSI) – connects to the gate of mosfet Q2 for green conductors
Pin7 (CLK) ̵
Pin8 – Vcc
Mysfets datasheet: https://www.vishay.com/docs/67519/si1012cr.pdf
On a mosfet there are 12 wires (total power consumption for 1 mosfet: P = I * U, P = 20mA * 4.5V = 90mW)
I also added 6 vias (2.54 mm apart for programming (heading 4 and heading 2 on SCH) 19659002] After SCH I arranged the board. I cut out the Christmas tree shape and then I laid out the components
I added two decoupling capacitors 100pF and 10uF to stabilize the input voltage.
Resistor 100 kOhm available in SCH I did not use
I added the gerber files for both PCBs.