Hi Cleo, finally it works fine. Thanks a lot.
I tell you some considerations:
I need to add the block: broadcast(START) after the block broadcast(UPDATE).
For the motors, the interval of speed is (-100,100), With the value 100, It seems the car moves very slow and the battery pack it’s OK.
One question, We have light sensor, that can detect black or white, we don’t have color sensor. Where is the type I must to put in the broadcast block. broadcast(S2 LIGHT) for example.
The last question, still it’s a mistery why I must in the first time open an example and after open my scratch project, in other case the motors don’t work.