On his return from Paris, where he had co-founded the “musical artists” group, Charles Blanc-Gatti set up Colorfilm in Montreux (1938), where he produced three commissioned animated films, as well as a “free” work, Chromophony (1939). An animated advertising film for Bitter, Les Diablerets was inspired by Frédéric Rouge's drawings. The Devil causes an avalanche that engulfs Derborence, but under the rocks grow the plants used to make this aperitif.