**Design Breakdown:**

1. **Background**:
   - Change the gradient from a blue tint to a sunset orange.

2. **Main Element**:
   - Replace the flag with a stylized abstract representation of the earth, symbolizing global unity instead of a national flag.

3. **Silhouette**:
   - Change the figure from a soldier using a telescope to a person holding a globe, representing peace and inclusivity.

4. **Structures**:
   - Replace the historical buildings with modern skylines of diverse cities, emphasizing a forward-looking perspective.

5. **Text**:
   - Change "HAPPY INDEPENDENCE DAY" to "CELEBRATE OUR UNITY" and modify the subtitle to "let’s embrace diversity."

6. **Icon**:
   - Remove the country flag icon and replace it with a globe icon to represent global harmony.

7. **Color Palette**:
   - Utilize vibrant colors that represent diversity rather than a specific national color scheme. 

This design shift illustrates a universal theme of unity and celebration without specific national references.