Surprisingly I found a webpage called jackson pollock painting. I just need to move my mouse, and then curves and dots appear on the webpage. The whole thing looks so real, as if I was splashing paint. Dots are made when I stopped my pen. The only drawback is I could not control the pen. Whenever I move my mouse, it will paint something, so I have to keep painting. Dots also appear in the places that I didn't expect. Moreover, the only color I have is black, so the painting does not show a lot contents. Nevertheless, it is the best splashing tool I have. Other painting tools cannot produce a line with changing width.