
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
Given a sequence $\{a_n\}$ where $a_n=-4n+5$, and a geometric sequence $\{b_n\}$ whose common ratio $q$ satisfies $q=a_n-a_{n-1}$ $(n\geqslant 2)$, and $b_1=2$, then the value of $|b_1|+|b_2|+\ldots+|b_n|=$ ______.

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