
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
On a circular track with a perimeter of 40 meters, there are two points moving: $A$ and $B$, with speeds of 3 meters per second and 1 meter per second, respectively. $B$ continuously moves in one direction on the track, while $A$ changes direction whenever it comes within 10 meters of $B$ (measuring the distance along the track). Describe the motion of $A$, given that the two points start at the endpoints of a diameter of the track at the same time and move in the same direction.

Present the answer in LaTex format: \boxed{Your answer}
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