Pause twice as long

Scratch, 8 blocks + 3 bytes

Equivalent in Python:

import time
n = 1
while 1:
    print("x")
    time.sleep(n)
    n = n * 2

05AB1E, 6 bytes

Code:

[=No.W

Explanation:

[        # Start an infinite loop
 =       # Print the top of the stack without popping
  No     # Compute 2 ** (iteration index)
    .W   # Wait that many milliseconds

Try it online!

MATL, 8 bytes

`[email protected]

The first pause is 2 seconds.

Try it at MATL Online. Or see a modified version that displays the time elapsed since the program started. (If the interpreter doesn't work, please refresh the page and try again).

Or see a gif:

Explanation

`     % Do...while
  G   %   Push input
  D   %   Display
  @   %   Push iteration index (1-based)
  W   %   2 raised to that
  Y.  %   Pause for that time
  T   %   Push true. This will be used as loop confition
      % End (implicit). The top of the stack is true, which produces an infinite loop