I've created a React Flow playground with animated block borders that flow from root to leaf nodes. The playground features:

1. A black background with green-bordered blocks
2. Animated borders that create a flowing effect
3. Animated connection lines between nodes
4. A hierarchical structure with root, child, and leaf nodes

The animation is created using CSS keyframes that make the border gradient flow around each node. The connection lines also have an animated dash effect that gives the impression of movement from parent to child nodes.

You can interact with the flow by:

• Dragging nodes to reposition them
• Using the controls in the bottom right to zoom and pan
• Creating new connections between nodes

The animation will continuously run, creating a dynamic visualization of data flow through the hierarchy.

I've recreated the workflow interface from your example with animated block borders that show movement from root to leaf nodes. The implementation features:

1. A dark-themed interface that matches the screenshot with:

   • Black background
   • Three workflow nodes: "Start Work", "Assign to Agent", and "Goal"
   • Dotted connection lines between nodes
   • Sidebar with workflow categories
   • Top toolbar with action buttons

2. The key animation feature is the flowing border effect:

   • Each node has a glowing green border animation
   • The animation timing is staggered between nodes to create a visual flow from the start node to the end node
   • The border appears to "travel" along the edges of each block

3. Each node includes the details from your example:

   • Node headers with IDs
   • Tools sections with icons
   • Integration status indicators
   • Approval requirement indicators with circles

The animation is created using CSS gradients and keyframes with carefully timed delays between each node to create the effect of the border flowing from the root node through the middle node to the leaf node.

You can interact with the flow by dragging nodes, zooming, and panning the canvas.