Glossy magazine paper beads
You'll need a glossy magazine (one you don't need any more). Pick a page in colors that match your desired necklace. Ad pages are very good for this purpose. Cut page long narrow triangles, the short side about 1.5 cm (0.6 inch). You'll make a bead out of each of the triangles. Starting from the short side of a triangle, roll it tightly around a thin stick (a knitting needle, for example), then glue down the tip. Take the finished bead off the stick and thread it onto a string. You might want also to pierce a hole across the bead and thread it that way. Try also making beads out of a black-and-white text page, you'll get a nice letter pattern.