diff --git a/src/main.zig b/src/main.zig
index 1516d5f..3bdb8d6 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -16,16 +16,24 @@ export fn init() void {
         .environment = sokol.glue.environment(),
     });
 
+    sokol.time.setup();
+
     pass_action.colors[0] = .{
         .load_action = .CLEAR,
-        .clear_value = .{ .r = 0.2, .g = 1, .b = 1, .a = 1 },
+        .clear_value = .{ .r = 0, .g = 1, .b = 0, .a = 1 },
     };
 
-    std.debug.print("Backend: {}\n", .{sg.queryBackend()});
+    std.log.info("Backend: {}\n", .{sg.queryBackend()});
+}
+
+fn timef() f32 {
+    return @as(f32, @floatCast(sokol.time.sec(sokol.time.now())));
 }
 
 export fn frame() void {
-    //const g = pass_action.colors[0].clear_value.g + 0.01;
+    //std.log.info("{}", .{sokol.time.now()});
+
+    pass_action.colors[0].clear_value.g = @abs(@sin(timef()));
 
     sg.beginPass(.{ .action = pass_action, .swapchain = sokol.glue.swapchain() });
     sg.endPass();