curlywas/examples/microw8/tunnel.cwa

import "env.memory" memory(4);
import "env.atan2" fn atan2(f32, f32) -> f32;

export fn tic(time: i32) {
    let i: i32;
    loop screen {
        let defer t = time as f32 / 10 as f32;
        let defer x = (i % 320) as f32 - 160.1;
        let defer y = (i / 320 - 128) as f32;

        i?120 = ((20000 as f32 / sqrt(x * x + y * y) + t) as i32 ^ (atan2(x, y) * 512 as f32 / 3.141 + t) as i32);
        branch_if (i := i + 1) < 320*256: screen
    }
}