oops! Just googled confetti quilts and showed something totally different.
Think of Monet's bridge painting - sketch a landscape outline onto fusible backing -or cotton fabric and spray with adhesive - cut strings into 1/4" or so bits, arrange [sprinkle] into positions to create a picture - press with iron to set, then use quilting or hopping foot with same-coloured threads, and meander all over to hold in place. I've seen some fabulous fabric art done like this.