Welcome to this Hour of code activity, sponsored by Trinket.io <iframe src="//player.vimeo.com/video/107443021?title=0&amp;byline=0&amp;portrait=0" width="600" height="337" frameborder="0" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe> Today we're going to learn the basics of a programming language named Python. Python is fun to learn but is also a **Real** programming language that powers websites and apps like Yelp.com and Twitter. ## Run your first program! No need to save the fun stuff until the end. Here's a program in Python. Press Run to see what it does: ```python.run:height=470 import turtle def draw_circle(turtle, color, size, x, y): turtle.penup() turtle.color(color) turtle.fillcolor(color) turtle.goto(x,y) turtle.begin_fill() turtle.pendown() turtle.circle(size) turtle.penup() turtle.end_fill() turtle.pendown() tommy = turtle.Turtle() tommy.shape("turtle") tommy.speed(500) draw_circle(tommy, "green", 50, 25, 0) draw_circle(tommy, "blue", 50, 0, 0) draw_circle(tommy, "yellow", 50, -25, 0) tommy.penup() tommy.goto(0,-50) tommy.color('black') tommy.write("Let's Learn Python!", align="center", font=(None, 16, "bold")) tommy.goto(0,-80) ``` At the end of this activity we'll come back to this example and you'll see you'll understand quite a lot about how it works. **In fact, you'll write or customize lots of your your own programs in just an hour!** ## Keep Going! You'll see lots of new things during this tutorial. Code may always look unfamiliar, and *no one knows everything* about code, not even the experts! So the most important thing is to **keep going**, even if you're confused or run into errors! Also, for each of the interactive examples you see, there is a **Reset** button in the left hand menu. If you want to start over, it will reset your code back to the beginning. Have fun!