This function generates a generative art ggplot
object using points and lines.
Arguments
- nx
Number of lines in x direction. Default 30.
- ny
Number of points per line. Default 100.
- max_size
Maximum size of points. Default 2.
- main_col
Vector of colours (or single colour). Default "black".
- bg_col
Background colour. Default "white".
- s
Random seed. Default 123.