The red one in the middle is the light-emitting diode, that is, the LED lamp, which generally plays the role of luminous warning;

In the lower right corner is the resistor, whose size can be judged by its color ring;

The red color in the lower corner is the capacitor, which plays the role of charging and discharging.

It's too dark to see clearly. It looks like a button switch.

The rest are wires, you know.

In my opinion, this circuit is a control switch circuit, which uses diodes, resistors and capacitors for rectification to drive the control switch control circuit.

If you want to draw a picture, you should talk about PCB in turn, draw components first, and then connect the jumper in the middle, so as to judge its function most accurately.