What type of movement do I need for this?

[Leander]

Hi. Another day, another question.

My monster should not use path movement and walk a drawn path but there should be the chance of direction changes.

The monster starts at x and should walk to 1. If the monster collides with waypoint 1 a random number is generated. The monster can either reverse and walk towards 2 or walk down to 3.
When it reaches 3 it either walks to 4 or walks back to 1.

1..x.2
......
......
3....4

This is not difficult. I know the basics but the ball movement does not work. I only need four directions...but despite high bouncing security and given directions the monster sometimes bounces in another angle and gets off the possible track between 1, 2, 3 and 4.

What movement do I need?

[InsertNameHere]

You can still use the ball movement all you have to do is:

+Monster collides with waypoint 1
+1 chance out of 2 at random (this is under the special conditions)
-Set Direction of Monster to (Direction to point 2)

+Monster collides with waypoint 1
+1 chance out of 2 at random
-Set Direction of Monster to (Direction to point 3)

[Leander]

Now it works, thanks.

1
.
.
2....4
.
.
3

The monster starts at 4 and walks to 2. At 2 it can either walk back to 4, walk up to 1 or walk down to 3. At 1 it walks down to 2, at 3 it walks up to 2.

My waypoints are boxes...the x value of 2 has to be smaller than the x values of 3 and 1 because otherwise the monster would e.g. go up but miss 1.

I can change the position of 2...then the monster might walk up...and down again but walks straight to 3 as it misses 2.

How can I code this? I don't want to change x and y values for all boxes until the bouncing movement is perfect. I think collisions are not that good for my movement.