On Dec 21, 2022, a light and sound show called Evanescent was held in Madrid, Spain. Evanescent uses natural and artificial (人工的) light to create a dynamic (动态的) show of colorful displays. The groups of large bubbles, covered with a special film, serve as a canvas (油画). It captures the light from all angles (角度) and breaks them down into different colors. The colors can change depending on whether it is day or night. The bubble show paves the way (为...做准备) for the LuzMadrid 2023 International Festival of Light.