diff --git a/Engine.Core/Systems/Yields/WaitForSecondsYield.cs b/Engine.Core/Systems/Yields/WaitForSecondsYield.cs
new file mode 100644
index 0000000..da82083
--- /dev/null
+++ b/Engine.Core/Systems/Yields/WaitForSecondsYield.cs
@@ -0,0 +1,10 @@
+using System;
+
+namespace Engine.Core;
+
+public class WaitForSecondsYield(float seconds) : ICoroutineYield
+{
+    private readonly DateTime triggerTime = DateTime.UtcNow.AddSeconds(seconds);
+
+    public bool Yield() => DateTime.UtcNow < triggerTime;
+}
diff --git a/Engine.Core/Systems/Yields/WaitWhileYield.cs b/Engine.Core/Systems/Yields/WaitWhileYield.cs
new file mode 100644
index 0000000..0c1bb4f
--- /dev/null
+++ b/Engine.Core/Systems/Yields/WaitWhileYield.cs
@@ -0,0 +1,10 @@
+using System;
+
+namespace Engine.Core;
+
+public class WaitWhileYield(Func<bool> condition) : ICoroutineYield
+{
+    private readonly Func<bool> condition = condition;
+
+    public bool Yield() => condition.Invoke();
+}