Welcome back to Scratch Music and Sound, day six.
Today you'll build a music video while learning about an important computer science concept, procedures.
In computer science, a procedure is a set of many instructions packaged together to create a new command.
In Scratch, the new command, or procedure, is a new custom block which you will create.
For example, you could create a block named CS First that instructs the computer to make the Scratch cat run on the screen and say, CS is awesome, and then run back off the screen.
Now we want the cat to appear in your program, just drag out the CS First block instead of creating a whole new set of blocks to make the cat appear and talk.
The CS First block as an example of a procedure.
Procedures are a short way to give the computer a set of instructions and they are another way computer scientists like you save time when coding.
Today you use procedures to create custom blocks to make your music video.
Scratch is a popular tool for making music videos.
You can upload a song and then animate it using the code blocks you learned about in this club.
This is an action packed music video, but the code isn't that complex.
The animations are simply costume changes.
Take a look at some other music videos built with code blocks.
♪I'm blue da ba dee da ba daa ♪ ♪ Da ba dee da ba daa, da ba dee da ba daa ♪ ♪ Da ba dee da ba daa ♪ ♪ The rooftops I remember there was snow ♪ ♪ White snow ♪ ♪ Clearly I remember ♪ ♪ From the windows they were watching ♪ ♪ While we froze down below ♪ ♪ When the future's architecture ♪ ♪ By a carnival of idiots on show ♪ ♪ You'd better lie low ♪ (guitar riffing)
Those are some awesome videos created by Scratch computer scientists like you.
Many of them built using blocks you had the chance to use.
Of course, creating music videos and animating them can take a lot of time, but the end result is ridiculous and those videos can be seen by thousands of people.
You can have a big impact on a lot of people and your experience with computer science will have life long value.
Take a look at this sample video that shows some techniques that you can learn today.
Each block you see here behaves in a fun and unique way.
You'll get a chance to choose which of these behaviors you want to create in the next screen cast.
First, start a new project.
Name it music video and delete the Scratch cat.
Next, click on the music library link on this CS First page and listen to a few songs.
(rock and roll music)
(slow guitar music)
In the new project that you just made, click on the stage and the sound tab and then upload the song that you chose.
Now you may need to look at your downloads folder to see where the song is placed, but that's okay.
Now it's your turn.
Create a new project named music video and delete the Scratch cat.
Choose a song from the CS First music library and upload it to the stage area of your program.
After completing those steps, go back to the CS First page and click the green arrow to move onto the next screen cast.
- Sign in to Scratch
- Create a new project and name it "Music Video"
- Delete the Scratch Cat
- Choose a song from the CS First library, download it, and upload it to the stage
- Self-Driving Cars - Science of Innovation, by NBC Learn, USPTO, and NSF, http://www.nsf.gov/news/mmg/mmg_disp.jsp?med_id=73824
- "It's Raining Tacos AWSOME" by electrodavid -- Licensed under CC BY-SA 2.0 (https://creativecommons.org/licenses/by-sa/2.0/)
- The song “Festival” is © YouTube-- CC-BY-SA 4.0 does not apply.
- "Pandas - "Violet Hill" Music Video" by Wjc0906 -- Licensed under CC BY-SA 2.0 (https://creativecommons.org/licenses/by-sa/2.0/)