remove the bevy based turtle and rename turtle-lib-macroquad to turtle-lib

turtle-lib/examples/koch.rs

@@ -0,0 +1,37 @@
+//! Koch snowflake fractal example
+
+use turtle_lib::*;
+
+fn koch(depth: u32, turtle: &mut TurtlePlan, distance: f32) {
+    if depth == 0 {
+        turtle.forward(distance);
+    } else {
+        let new_distance = distance / 3.0;
+        koch(depth - 1, turtle, new_distance);
+        turtle.left(60.0);
+        koch(depth - 1, turtle, new_distance);
+        turtle.right(120.0);
+        koch(depth - 1, turtle, new_distance);
+        turtle.left(60.0);
+        koch(depth - 1, turtle, new_distance);
+    }
+}
+
+#[turtle_main("Koch Snowflake")]
+fn draw(turtle: &mut TurtlePlan) {
+    // Position turtle
+    turtle.set_speed(1001);
+    turtle.pen_up();
+    turtle.backward(150.0);
+
+    turtle.pen_down();
+
+    // Draw Koch snowflake (triangle of Koch curves)
+    for _ in 0..3 {
+        koch(4, turtle, 300.0);
+        turtle.right(120.0);
+        turtle.set_speed(1200);
+    }
+
+    turtle.hide(); // Hide turtle when done
+}