These are the programs I tried to program the robot, each has a different action .

-It starts moving after a countdown of 5 seconds.

-If an objects  is detected at less than 20 cm, the robots stop.

-It turns avoid the contact with the objects, it continues going stright on.( 82)

-If an objects is detected, the motors start to move during 2 seconds. (83)

- Use the touch sensor to detect an object. If that happens, program the robot to avoid the impact.(84)

- It goes straight on during 3 seconds after making a loud noise, it stops.
-It makes a U-turn, it returns to the original position, i makes a U-turn.(85)