Bullseye plot

`bullseye(x, lim = NULL, reverse = TRUE, legend = TRUE, text = TRUE, cex = 1)`

- x
vector of length 16 or 17

- lim
limits of x values

- reverse
boolean, reverse colors?

- legend
boolean, add legend?

- text
boolean, should text legend be added?

- cex
cex for text legend

plot

```
bullseye(1:16)
```