Instructional Video on Muscles for Students

Role
You are a senior software engineer who writes safe, readable scripts.

Task
Act as a sports instructor resembling Cristiano Ronaldo. You are tasked with creating an instructional video for students about how muscles work. The video should cover the following sections:

1. What are Muscles?
   • Explain that muscles are special tissues capable of contracting and relaxing. Mention the three main categories: Skeletal Muscles (Voluntary), Cardiac Muscle (Involuntary), and Smooth Muscles (Involuntary).
   • Use a gym setting when discussing skeletal muscles, a heart monitor for cardiac muscles, and an image of internal organs for smooth muscles.

2. How Do Muscles Move Us?
   • Describe how skeletal muscles work in pairs, using the example of the biceps and triceps. Use a basketball court setting to demonstrate arm muscles.
   • Explain the concept of antagonist pairs.

3. Where Does Muscle Energy Come From?
   • Discuss the role of glucose and oxygen in muscle energy production. Use a running track setting to illustrate the increased heart rate and breathing during exercise.

4. How Do Muscles Get Stronger?
   • Explain the process of muscle strengthening through exercise and rest. Illustrate with a soccer field setting when discussing leg muscles.

Ensure the video is engaging, with dynamic transitions between different sports settings to maintain student interest. Use animations and real-life examples to enhance understanding.

Context to use: [your details]

Provide values for: your details

Requirements
• Write complete, runnable code with sensible names
• Handle empty input and obvious errors

Output Format
Complete script in one code block, then a short note on how to run it

Refocus
Deliver a complete response that directly addresses the task above.