**Course Title:** Introduction to Programming with Scratch **Section Title:** Loops and Conditionals **Topic:** Using conditionals to create interactive projects (e.g., sprite reactions to inputs) **Introduction:** Now that we've learned about conditionals, let's dive deeper into using them to create interactive projects. In this topic, we'll explore how to use conditionals to create reactions to inputs, making our projects more engaging and immersive. **Understanding Conditional Statements:** Before we start creating interactive projects, let's quickly review conditional statements. In Scratch, we use conditionals to make decisions based on certain conditions or inputs. The most common conditionals in Scratch are: * If-Then blocks (e.g., `if [touching mouse-pointer] then...`) * If-Else blocks (e.g., `if [touching mouse-pointer] then... else...`) **Creating Interactive Projects with Conditionals:** Conditionals are essential for creating interactive projects. Here are a few examples of how we can use conditionals to create sprite reactions to inputs: * **Mouse Clicks:** Imagine you want a sprite to dance when the user clicks on it. You can use an if-then block to check if the mouse is clicking on the sprite. If true, the sprite will perform a dance. * **Keyboard Inputs:** Suppose you want a sprite to move when the user presses a specific key. You can use an if-then block to check if the designated key is pressed. If true, the sprite will move in a specific direction. * **Collisions:** Picture a scenario where you want a sprite to change color when it collides with another sprite. You can use an if-then block to check if the two sprites are touching. If true, the sprite will change color. **Example Project:** Let's create a simple interactive project to demonstrate the use of conditionals. We'll create a sprite that changes color when it collides with another sprite. **Step 1:** Create two new sprites and give them different colors. **Step 2:** Drag an `if-then` block from the `Control` category and place it in the first sprite's script. Set the condition to `touching` and select the second sprite. **Step 3:** Inside the `if-then` block, add a `change color effect by [50]` block from the `Looks` category. **Step 4:** Run the project and observe how the first sprite changes color when it collides with the second sprite. **Tips and Variations:** * Experiment with different conditionals (e.g., if-else, if-then, and/or) to create various reactions. * Use multiple conditional blocks to create complex behaviors. * Combine conditionals with loops to create repetitive actions. **Practical Takeaways:** * Conditionals are essential for creating interactive projects in Scratch. * Use if-then and if-else blocks to check for specific conditions or inputs. * Experiment with different conditionals to create various reactions. **Conclusion:** By mastering conditionals, you'll unlock the door to creating more engaging and interactive projects. Practice using conditionals to create sprite reactions to inputs, and don't be afraid to experiment with different conditional blocks and scenarios. **What's Next?** In the next topic, we'll introduce variables in Scratch and explore how to create and use variables in our projects. **Resources:** * Scratch Documentation: [Conditional Blocks](https://en.scratch-wiki.info/wiki/Conditional_Statement) * Scratch Tutorials: [Conditional Blocks](https://scratch.mit.edu/ideas/conditional-blocks) **Leave a comment or ask for help:** Feel free to ask any questions or leave comments below if you're unsure about any concept or need further clarification.