some more examples

turtle-lib/examples/squares.rs

@@ -0,0 +1,27 @@
+use turtle_lib::*;
+
+#[turtle_main("Squares")]
+fn draw(turtle: &mut TurtlePlan) {
+    turtle.set_speed(1000);
+    for i in 0..36 {
+        let base_color = if i % 2 == 0 {
+            Color::new(1.0, 0.0, 0.0, 1.0) // red
+        } else {
+            Color::new(1.0, 1.0, 1.0, 1.0) // white
+        };
+        let alpha = (1.0 - i as f64 / 54.0) as f32;
+        let fill_color = Color::new(base_color.r, base_color.g, base_color.b, alpha);
+        turtle.set_fill_color(fill_color);
+        turtle.begin_fill();
+        square(turtle);
+        turtle.end_fill();
+        turtle.right(10.0);
+    }
+}
+
+fn square(turtle: &mut TurtlePlan) {
+    for _ in 0..4 {
+        turtle.forward(200.0);
+        turtle.right(90.0);
+    }
+}