Get 2 rods of any colour, ...
If you clean up your bench there will be leftovers of different colors. Assort them roughly into golor groups, you know they will not go ugly on mixing. For example go for greens and blues and take about 10...20 grams. Heat up the end of a glass rod and attach the leftovers to the end. Melt out as much air as possible while doing this and attach a second rod for mixing and better control. Don't mix completely and pull into a thin rod or fat stringer.
Start making beads with that marbled glass. Just winding round the mandrel will give beads with stripes. If you start with a tiny winding and adding fat dots to the equator, the pattern will be totally different after melting the bead into shape. For larger beads start with a medium bicone from a cheap glass. Add a fat layer of marbled dots to the equator and melt the marblked glass round and flat. You can "pull" the colored glass with heat and gravity to the ends of the bead, one end at the time. Shape the bead inro a long olive or a bicone and you're done.
Adding just random dots of the marbled glass to a base bead is easier and gives a totally different pattern. Experiment with separate dots or a fully covered surface. The results are different.
Add stripes of marbled glass to the length of a cylindric base bead and cover the whole surface of the bead. Melt the bead round and reshape or let the middle section do "the wave".
A totally different design needs tuequoise glass abnd clear. Make a base bead in turquoise and reduce the surfave. Add some squiggles or other pattern with clear stringers, melt flat and burn away the reduced surface. Swap the decoration and reducing the surface without burning away the reduction.
Add fat clear dots to a marbled bead or a bead with frit decoration. Melt the dots flat or leave them raised.