I have a coding problem in Lego EV3 Mindstorms

westblood

Hi,
I'm having trouble with codes "if then" and "if then else".
My aim is,

• When the robot sees red it will start the D engine and drop the lego piece.

• When the robot sees black, it will start the a motor and lower the arm and pick up the load standing on the road.

• If the robot does not see red and black, it will continue on its way and will stop when it sees the wall.

I have uploaded the coding screenshot.
It isn't working properly.
The robot only does the stopping part when it approaches the wall.
Where am I doing wrong?

Huw

Perhaps try making it event driven rather than in a forever loop

when program starts
initialise and start moving



when 2 is red
...



when  2 is black
...



when wall is close
stop moving