feat: add strobe animation

src/main.rs

@@ -92,6 +92,7 @@ enum Action {
 enum Animation {
     Rainbow,
     Bling,
+    Strobe,
 }
 
 fn bling(layout: Layout, frame: u32) -> RgbImage {
@@ -160,6 +161,22 @@ fn rainbow(layout: Layout, frame: u32) -> RgbImage {
     })
 }
 
+fn strobe(layout: Layout, frame: u32) -> RgbImage {
+    let w = layout.width_px();
+    let h = layout.height_px();
+
+    let brightness = 120;
+    let period = 15;
+
+    RgbImage::from_fn(w, h, |_, _| {
+        if frame % period < period / 2 {
+            Rgb([brightness; 3])
+        } else {
+            Rgb([0, 0, 0])
+        }
+    })
+}
+
 fn print_image(image: &RgbImage) {
     let _hide = termion::cursor::HideCursor::from(stdout());
 
@@ -237,6 +254,7 @@ fn main() -> anyhow::Result<()> {
                 match animation {
                     Animation::Rainbow => rainbow,
                     Animation::Bling => bling,
+                    Animation::Strobe => strobe,
                 },
             )?;
         }