Control frames in the animation

Hello, I have an animation that will be a display of collection objects. This animation has 6 frames, where the first all empty and appear as the collection, the display will fill like this:

frame0:( )( )( )( )( )

frame1:(X)( )( )( )( )

frame2:(X)(X)( )( )( )

frame3:(X)(X)(X)( )( )

frame4:(X)(X)(X)(X)( )

frame5:(X)(X)(X)(X)(X)

But every time the player collides with the object, the animation progresses two frames. What am I doing wrong? How to fix it?

dropbox.com/s/upzuy64ltm4lacq/coleta.capx

try this db.tt/kNzUK6Up

Thank you. I'm beginner in Construct, english and programming. I dont understand the expression Object.Count. What exactly it to do?

Thanks again!

The Object Count is the total number of instances (or copies) of a given object. So, if there are 2 bullets on the screen Bullet.Count would equal 2. Don't forget about any objects not destroyed outside the visible area.