When button DI$\_2$ is pressed, both light DO$\_0$ and DO$\_1$ turn on$.$

When button DI$\_2$ is released, light DO$\_0$ turns off, while light DO$\_1$ stays on until $15$ seconds.

After $15$ seconds, light DO$\_1$ turns off.

Pressing the switch DI$\_2$ again should repeat everything.

Pressing the switch DI$\_3$ should reset the timer and turn off all the lights at any time in the process.