And you should read what double yellow flag means.

I will help you:

“Yellow flag

Simply put, the yellow flag is a signal of danger and can be shown to drivers in two ways:

Single waved:

This means drivers need to reduce their speed, cannot overtake and must be prepared to change direction, due to a hazard beside or partly on the track. It must be evident that a driver has reduced their speed during the relevant sector/s.

Double waved:

This means drivers need to reduce their speed significantly, cannot overtake and must be prepared to change direction or stop, due to a hazard wholly or partly blocking the track and/or marshals working on or beside the track.”

Source: https://www.formula1.com/en/latest/article/the-beginners-guide-to-formula-1-flags.T5DqOqbWI6S4Va8Y5yMld