diff --git a/README.md b/README.md
index e6f8a0b..545f325 100644
--- a/README.md
+++ b/README.md
@@ -11,28 +11,27 @@ compiler not implement any optimizations except for constant folding.
 
 ```rust
 import "env.memory" memory(4);
-import "math.sin" fn sin(f32) -> f32;
-import "math.atan2" fn atan2(f32, f32) -> f32;
+import "env.sin" fn sin(f32) -> f32;
 
 export fn tic(time: i32) {
     let i: i32;
     loop screen {
-        let defer t = time as f32 / 2000 as f32;
-        let defer o = sin(t) * 0.8;
-        let defer q = (i % 320) as f32 - 160.1;
-        let defer w = (i / 320 - 128) as f32;
-        let defer r = sqrt(q*q + w*w);
-        let defer z = q / r;
-        let defer s = z * o + sqrt(z * z * o * o + 1 as f32 - o * o);
-        let defer q2 = (z * s - o) * 10 as f32 + t;
-        let defer w2 = w / r * s * 10 as f32 + t;
-        let defer s2 = s * 50 as f32 / r;
+        let lazy t = time as f32 / 2000 as f32;
+        let lazy o = sin(t) * 0.8;
+        let lazy q = (i % 320) as f32 - 160.1;
+        let lazy w = (i / 320 - 120) as f32;
+        let lazy r = sqrt(q*q + w*w);
+        let lazy z = q / r;
+        let lazy s = z * o + sqrt(z * z * o * o + 1 as f32 - o * o);
+        let lazy q2 = (z * s - o) * 10 as f32 + t;
+        let lazy w2 = w / r * s * 10 as f32 + t;
+        let lazy s2 = s * 50 as f32 / r;
         i?120 = max(
             0 as f32, 
             ((q2 as i32 ^ w2 as i32 & ((s2 + t) * 20 as f32) as i32) & 5) as f32 *
                 (2 as f32 - s2) * 22 as f32
             ) as i32;
-        branch_if (i := i + 1) < 320*256: screen
+        branch_if (i := i + 1) < 320*240: screen
     }
 }
 ```
@@ -43,4 +42,4 @@ You can compile this to `technotunnel.wasm` with the command
 curlywas technotunnel.cwa
 ```
 
-Then run it on [MicroW8](https://exoticorn.github.io/microw8/v0.1pre1)
\ No newline at end of file
+Then run it on [MicroW8](https://exoticorn.github.io/microw8/v0.1pre2)
\ No newline at end of file