Figure 8 is double 4
Figure 4 is half of 8
If you skate, you would be great,
If you could make a figure 8,
That's a circle that turns round upon itself.

Figure 8 is 2 times 4
4 times 4 is 2 times 8
If you skate upon thin ice,
You'd be wise if you thought twice,
Before you made another single move.
[ Lyrics from: http://www.lyricsfreak.com/e/elliott+smith/figure+8_20504902.html ]