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Introduction
This is the result we will create, a row of light balls curling to form the number 8, each ball follows the one in front with a small gap, and their sizes automatically shrink. Let's start. Hello, welcome back to the complete Adobe After Effects series from Cerdas Inovasi Digital. Expressions become very powerful when one expression is used across many layers. The two keys are index, the layer's order number, and valueAtTime, the value of a property at a different time.
Step 1: Leader Ball
Create a new composition with a dark blue background. Create a toska-colored circle named 'Pemimpin' with the add mode. In position, type the expression value plus parentheses mass sign time multiplied by 2x500, and mass sign time multiplied by 4x250. The balls move to form the number 8.
Step 2: Size from Index
Index is the layer's order number in the timeline, starting from one at the top. In scale of 'Pemimpin', type S equals 30 plus index multiplied by 10, then parentheses S,S. Since 'Pemimpin' is layer 1, its scale is 40%. Later, each layer will have a different size automatically.
Step 3: First Follower
Duplicate 'Pemimpin' with Ctrl D and name it 'Ekor'. Replace the position expression of 'Ekor' with diskom dot layer index plus 1, dot transform dot position dot valueAtTime parentheses time minus 0,12. This means, take the position of the layer below it 12 per 100 seconds ago.
Step 4: Duplicate Chain
Select 'Ekor' and press Ctrl D 5 times. Each duplicate automatically follows the layer below it, forming a chain. And because the indexes are different, the scale of each ball is also different. The lower the layer, the bigger the ball, so 'Pemimpin' becomes the largest head. The 0.12 second delay makes the balls close to each other.
Step 5: Set Delay
A larger number makes the chain more spaced out. The same expression in all layers can be changed at once by selecting the layers and pasting a new expression.
Step 6: Preview
Play the preview. A row of light balls curl to form the number 8 like a snake, even though there are no keyframes in this composition.
Done!
Done. We've used index for automatic scaling, mesain for leader motion, valueAtTime to get past positions, and duplicated expressive layers into a chain. In the next episode, we'll dive deeper into mesain, linear, and ease. Need a promotional video, logo animation, motion graphics for social media, or visual effects for short films? Cerdas Inovasi Digital provides motion graphics and visual effects services, as well as After Effects courses from beginner to advanced. Want to master the entire series? 104 episodes from the interface to final projects? All episodes, complete with PDF step-by-step guides, source footage, and project scripts, are available to premium tutorial subscribers. Subscribe starting at Rp69.000 per month, save 28% with the 12-month package, or pay once Rp999.000 for lifetime access. Want just one class? Buy single classes with lifetime access. Subscribe now at the premium page cerdasinovasidigital.com Contact us via WhatsApp, or visit cerdasinovasidigital.com Thank you for watching, see you in the next episode.
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Cerdas Inovasi Digital Team
Software developers, BIM & 3D engineers, and AI practitioners
52 video classes1,276 episodes
We build software, BIM models, games and AI automations for clients every day, and turn that hands-on work into step-by-step classes: every step is shown on screen and comes with a PDF guide you can keep.
