
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
There are 8 billboards on the same side of a north-south pedestrian street. The background color of the billboards can be chosen from two colors: red or blue. If the only requirement is that the background colors of two adjacent billboards cannot both be red, find the total number of different color schemes.

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