Deploying bridge#1534

Is it possible to make a bridge that can cross the ravine as the zones open up?

Or just replace the ravine with a lava flow tjat will despaen when the laser is removed.

One between z1 and 2 will open after laser 1

Then the others would open after z3 is unlocked to make it easy to return to zone 1 when in the surface.

Now yhe same can happen between zone 3 and zone 1 when zone 3 opens for the undergroud system

A bridge only activatable from the high tier side maybe