I'll create a pulsating animation for the blue circle in your door lock interface. Let me recreate this component with a smooth pulsating effect.

I've created a pulsating door lock interface that recreates your design with smooth animations! The blue circle now features multiple pulsating effects:

• Outer ring: Uses animate-ping for expanding ripple effects
• Middle ring: Uses animate-pulse for a breathing effect
• Main circle: Smooth gradient background that transitions to green when unlocked

The component includes a 10-second countdown timer and automatically transitions to an unlocked state. I've also added a reset button so you can see the animation cycle again. The pulsating effects stop once the door is "unlocked" and the circle turns green with a subtle scale animation.