Write Python, press run, and watch execution stream into a living graph. Scrub a timeline to replay any moment — deterministically — down to the variable.
Edit Python in a focused editor. One run opens a stream — no setup, no build step, no login.
Each value, call and collection becomes a node. Data flows in on cyan, execution flows out on amber.
Drag the timeline and the whole surface rebuilds at that exact step — graph, console and variables in lockstep.
1def fibonacci(n):2 seq = [0, 1]3 while len(seq) < n:4 seq.append(seq[-1] + seq[-2])5 return seq67numbers = fibonacci(8)8total = sum(numbers)
Follow control as it moves — calls, branches and loops trace themselves across the graph as amber execution edges.
Every variable, in every scope, at every step. Collections show their deltas: what was appended, sorted, removed.
The timeline is the source of truth. Rewind to any step and the entire surface is rebuilt exactly as it was.
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