Loom: Anatomy Heddles allow multiple warp strings to be lifted at once. Leashes attach warp strings to heddles. Heddle Stands: Hold the heddles in place when lifted. Frame Loom, Weaving Needle, Warp:vertical Strings attached to loom. Weft:horizontal Strings, Tension Rainbows: Method creating 'rainbow' shapes while running the weft strings across, maintains even tension. Butterflies: knots on a length of string so as to maintain it in place Comb: a tool to beat down the tension rainbows.