Fix big Puffy ascii logo

postmarketOS: Add small ASCII logo

postmarketOS: Replace ASCII logo

Made variables local in get_cols function

Where supported, keep on/tiny/off flags in the same order

The variables blocks, blocks2, and cols were not set as local in the
get_cols function, which made neofetch print whatever value they had
before showing the colorblocks. This commit makes these variables local
so the output doesn't get affected if they are set beforehand.