# increase speed after x seconds

Member, PRO Posts: 27

Hello again,
so basically for 10 seconds I have actors moving down the screen (270 degrees) and they are at a speed of 150. What I am trying to do is increase the speed up to 200 after 10 seconds. how can I do this?

• Member, Sous Chef, PRO, Senior Sous-Chef Posts: 11,937

Use a timer to determine when 10 seconds have passed. Make sure that your speed value is an attribute rather than a constant. Within the timer behavior, change the speed attribute to 200.

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• Member Posts: 288

In the actor that is moving down:
• Create a self integer attribute: self.velocityY
• Create a self integer attribute: self.timerspeedchange and set it to 10
• Create a self integer attribute: self.speedY and set it to -150

Create RULE inside that same actor:
When velocity Y is < 0 ,
•Then put a timer behaviour inside that rule:
••every 1 second:
put a "change attribute" behaviour in that "timer" behaviour:
• self.timerspeedchange to self.timerspeedchange-1

Create another RULE inside that same actor:
When self.timerspeedchange = 0:
put a "change attribute:"
• self.speedY to - 200

Of course, you must use the motion attribute: self.velocity to command the speed of the actor... this is why you must use -150.

• Member, PRO Posts: 27

I tried doing that and it didn't work so I must've put in the code wrong

• Member, PRO Posts: 27

Its okay now, I got the change of speed working thank you!!

• Member, Sous Chef, PRO, Senior Sous-Chef Posts: 11,937

Glad you got it working. Another way to think of this is to understand that the Move behavior constantly checks the speed value. So you can also do it this way:

Move [direction: 270] [speed: game.speed]

Timer
After 10 seconds
Change attribute game.speed to game.speed+50

That way, if you have other changes you want to make to the speed, you only need a single Move behavior.

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