In one sentence, describe what the following article is about: Choose several colors of nail polish and unscrew the lids. Leave them loose in front of you so you can quickly switch between them. You'll need to move fast to make the pattern before the polish dries. This will take longer than you're used to, due to the thick coat. Once it's ready, cover in a top coat, peel off your tape, and admire your design.
Summary: Prepare to work quickly. Wait for it to dry.

In one sentence, describe what the following article is about: Take a pen and push it straight down into the center of your mixture. It doesn't have to be pushed down to the bottom of your tube; but, it needs to be far enough down so that you it stands on its own. Leave it for at least an hour to harden. Remove the pen and replace it with a firework fuse. Use a piece of a cotton ball to help secure the fuse in the smoke bomb. Be sure there is at least " of fuse left so that you can light the smoke bomb. The fuse itself isn't dangerous until lit. However, make sure to do this away from any open flame.
Summary: Push a pen or pencil into your mix. Replace the pen.

In one sentence, describe what the following article is about: It bears mentioning that, though people commonly use the word "octagon" to refer to a regular octagon (one with sides and angles that are the same size), this is not, strictly speaking, the only kind of octagon that exists. Any shape with eight sides is an octagon by definition, just not a regular octagon. Thus, making a shape with eight sides of different lengths, rather than of the same length, produces an irregular octagon. As with their side lengths, octagons don't necessarily have to contain angles that are all 135o. As long as your shape has eight sides, angles of smaller or greater size than 135o can be used, resulting in an irregular octagon. The exception to this rule is for angles of exactly 180o. Generally, the two line segments that make up such an angle can be considered a single edge in a polygon. It's also worth nothing that special types of polygons called star polygons can have lines that cross over one another. For instance, an ordinary five-pointed star is drawn in this way from five lines that intersect each other in multiple locations. Similarly, it's possible to make an eight-pointed star from eight lines of equal length. It's also possible to make eight-sided shapes with sides that intersect without making a tidy, symmetrical star shape. These shapes can be generally be considered "special case" octagons.
Summary:
Use eight sides of varying length. Use angles of varying size. Use sides that intersect themselves.