How the second transistor from the left reaches the ON state.
After all, there is no closing of a circuit from the positive voltage of the voltage source, the current can not reach the negative voltage source, because it is stopped at the collector of the first transistor from the left,
When the first transistor is off.
So in my view the second transistor from the left, can not be turned on,
STOP SHOUTING.
Nothing is obvious,
As I said in the reply to your private message,
I only follow schematics, I've no idea of the pinouts of your transistors and no intention of trying to follow your breadboard layout.
I UNDERSTAND THE SCHEMATIC
BUT I DON'T UNDERSTAND THE PICTURE
IN THE PICTURE IF YOU LOOK FROM THE LEFT SIDE
THE SECOND TRANSISTOR SHOUD NOT BE WORKING WHEN YOU PRESS THE RIGHT BUTTON
BUT ACTUALLY IS WORKING.
I DON'T UNDERSTAND WHY