"In 1942 when I was in New York, I was struck by the neon advertisements flashing all over Broadway. You are there, you talk to someone, and all of a sudden he turns blue. Then the colour fades - another one comes and turns him red or yellow. The colour – the colour of neon advertising is free; it exists in space. I wanted to do the same in my canvases."
January 1, 1970
https://en.wikiquote.org/wiki/Fernand_L%C3%A9ger