How to create a Bead

By definition, a Bead has one point, but you can vary the radius of the Bead:

new bead NAME
{
  radius = REAL
}

How to add Single

Singles can only be attached at the center of the Bead:

new bead NAME
{
  radius = REAL
  singles = SINGLE_SPEC [, SINGLE_SPEC] ...
}

SINGLE_SPEC is an optional number (1 by default) followed by the name of the Single, for example grafted or 10 grafted, if this is the name of a Single.