Initial commit.

src/main.rs

@@ -0,0 +1,18 @@
+extern crate ansi_term;
+
+use std::f32::consts::PI;
+use ansi_term::Colour::RGB;
+
+fn main() {
+    let (red, green, blue) = rainbow(0.1, 0);
+
+    println!("{}", RGB(red, green, blue).paint("Steel blue"));
+}
+
+fn rainbow(frec: f32, i: usize) -> (u8, u8, u8) {
+    let red = (f32::sin(frec * i as f32) * 127.0 + 128.0) as u8;
+    let green = (f32::sin(frec * i as f32 + 2.0 * PI / 3.0) * 127.0 + 128.0) as u8;
+    let blue = (f32::sin(frec * i as f32 + 4.0 * PI / 3.0) * 127.0 + 128.0) as u8;
+
+    (red, green, blue)
+}