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There is my code, but my color1,2,3 can be bigger than 255 and less than 0, how to fix it?
and when I run the program, there is a solid black ellipse in the center even if I don't press my mouse. How can I erase it?
Please don't post screenshots of code.
Instead, paste the code itself so that people can read/test it, and format it by highlighting your code and pressing Ctrl+o. https://forum.processing.org/two/discussion/15473/readme-how-to-format-code-and-text
You can use colorMode to scale color to any values.
colorMode(RGB, 0, 500);
or use constrain to constrain a value to 0..255 range
or map() to convert from one range to another.