PowerPoint's way of making twinkling stars

I believe that everyone has seen the stars in the sky Flash a flash of the effect of Flash, are generally produced by the animation effect of the use of PowerPoint can be made? Let's see: Using PowerPoint to make flashing stars, the system creates a new blank slide:

Painting a star: Click into the Insert menu tab, find the Shape button in the illustrations group, add a "star and Banner"/"Cross star" graphic to the slide, and paint at random size:

Next we double-click this "Cross Star", the PPT menu item automatically switches to the Format tab, click Shape Fill in the Shape Styles group to set the yellow fill color, and click Shape outline to set the no outline format, and adjust the size of the star:

Next, give this "cross Star" a PPT2007 animation of the slide custom animation, switch to the Animation menu tab, click the Custom Animation button, and in the Custom Animation pane on the right, add animation → accent → Flash, if there is no "flashing" This animation option, please go to " Other effects "Inside look for:

Next, we set the cross star "flashing" animation effect, right-click Select the shortcut menu "Timing", in the "Timing" Settings window setting start to "before", Delay to "2" seconds, Speed of "1" seconds, repeat as "until the end of the slide":

A star set, we clicked on the Star, copy and paste the same star, and in the Custom Animation task pane, change the start option to after, and then use the timing option in the Flashing Animation Properties dialog box to set the delay option to 1 seconds.

Continue to copy each of the above two cross stars, setting the delay option to 1.5 seconds and 0.5 seconds, respectively. At the same time select the 4 cross stars, as necessary to copy a number of copies.

Set the background of the slide as black, how does ppt set the background? Right-click Format Background for the Options shortcut menu on the slide blank, and then in the Format Background window, select Fill's solid fill, and in color, set Select Black: