NORTH ADAMS — They glued. They painted. They sewed. And in the end, more than 30 artists created dozens of new works using vintage photos, magazine scraps, fabric, corrugated cardboard, and film, during the course of a four-day art marathon at MCLA Gallery 51.

The artists, some coming from as far away as Boston and New York, were participating in ‘‘100 Hours in the Woodshed IV,’’ a biennial 100-hour collage art marathon started at the gallery in 2007 by artist Daniel ‘‘Danny O’’ O’Conner.