added new idea for delay

ideas/delay_structure.cpp

@@ -0,0 +1,45 @@
+// check it out on Compiler Explorer : https://godbolt.org/
+struct Delay
+{
+    virtual void wait() = 0;
+};
+
+
+struct FreeRTOS_Delay : Delay
+{
+    void wait() override
+    {
+        _wait();
+    }
+    private:
+    static void _wait()
+    {
+        for(volatile int i = 0; i < 10; i++);
+    }
+};
+
+struct STM_Hal_Delay : Delay
+{
+        void wait() override
+    {
+        _wait();
+    }
+    private:
+    static void _wait()
+    {
+        // systick stuff here
+        for(volatile int i = 0; i < 1000; i++);
+    }
+};
+
+
+
+
+int main()
+{
+    FreeRTOS_Delay dly;
+
+    dly.wait();
+    return 0;
+}
+