There are different things in Thymio:
first, the basic modes (colors when you play with Thymio without programming). These cannot be removed unless you make a custom firmware (not advised -if you don't know exactly what you're doing you will damage your robot)
Then, when you program, you're in the user mode. In that mode, usually, if you turn off the robot and on again, the program will be forgotten. If you want to keep it in the robot, you can use Tools->write the program(s)…->…inside thymio II. This will add a behavior to the 6 basic ones (colors) where no color is activated. Reminder: when you start the robot you're in the "color menu" and can choose the mode: green (friendly), yellow (explorer), red (fearful), cyan (investigator), magenta (obedient), blue (attentive), no color (user mode, present only if you wrote a program into the robot)
Finally, if you program the robot to make it move, then you just erase everything, clic load & run, the robot will keep on moving, because no new orders have been sent to the motors… If you want to stop it you can:
- explicitly program it to stop
- double clic in the Variables window and put the motor target to 0
- turn the robot off and on again
