Directional Arrow Keys

Purpose: Students will create 4 programs, each building upon the skills of the previous program, that will have them develop the use of Directional Keys and "Sensing."
Read the Gradesheet for Hints that will help you write the following Programs.
Gradesheet

• Program #1: Learning How To Use Directional Keys.
  • "Moving the Princess Using Directional Keys": Mobile (You Tube)



• Program #2: Learning How to Use "Senses" Code.
• "The Princess gets points when she touches the Unicorn:" Mobile (You Tube)
• Big Hint: Notice how the unicorn moves to a randomly generated point on the screen. Each time a Directional Key is pressed, a Broadcast should be sent off and Received in the Unicorn, which triggers an If/Then statement which states that If the Princess is Touched, then the Unicorn will move to a randomly generated X & Y coordinate. Additional Hint: Place the “Change Points by 1” block in this If/Then Statement.  



Unicorn Code



• Program #3: Add a Timer
• Now you will add a Timer to limit the length of the chase...just copy the code from last weeks project: Mobile (You Tube)
• Hint: Copy Program #2. Add a Repeat Loop to each Directional Key Program in the Princess that contains an “If Time >0 Then…the code that allows her to Move begins. the Princess triggered by a green flag that uses a Repeat Loop to count down 10 seconds. When the Loop finishes, say “Times Up” and then “Stop All.”
•  How To Stop Princess’s Movement When Timer Ends: Add an If/Then command to each Directional Key program that you wrote for the Princess in Program #2 so that “If “Time is > 0” Then the Princess’s movement is allowed to take place. The Broadcast should follow the If /Then command.

Add Timer	Stop Princess’s Movement When Timer Ends

• Program #4: Increase the Games Difficulty
• "Chased by a Knight." Add a Knight to the chase. If he touches the Princess...the game is over: Mobile (You Tube)
• How To Stop The Knight: Copy Program #3. Add a Program to the Knight that contains a Repeat Until “Time = 0”. In this Repeat Loop, include the Knight’s motion pursuing the Princess. Also add an If/Then statement that will contain a “Say” & “Stop All” commands If the Knight touches the Princess. 
•  How To Stop The Princess After She Is Touched By The Knight: In each Directional Key Program you wrote in the Princess, add an If/Then statement that is triggered when Touched by the Knight and causes the “Time = 0” followed by “Stop All.”

How To Stop The Knight:	How To Stop The Princess After She Is Touched By The Knight