XX----------------------------------------------------------XX
|XXX                                                        |XXX
|  XX                                                       |   XXX
|   XX------------------------------------------------------+-----XXX
|    |                                                              +
|    |     +----------------------------------------------------+   |
|    |     |                                                    |   |
|    |     |                                                    |   |
|    |     |                                                    |   |
|    |     |                                                    |   |
|    |     |                                                    |   |
|    |     |            12:34:56  <------+  Characters to replace!  |
|    |     |                                                    |   |
|    |     |     <--------------------------+                   |   |
|    |     |                                                    |   |
|    |     |                                                    |   |
|    |     |                                                    |   |
+XX--+     |                                                    |   |
  XX |     +----------------------------------------------------+   |
   XXX                                                              |
     +--------------------------------------------------------------+

#!/bin/bash

function printThing(){
local timeVar=$(date +"%T")
local lines=('    XX----------------------------------------------------------XX' '    |XXX                                                        |XXX' '    |  XX                                                       |   XXX' '    |   XX------------------------------------------------------+-----XXX' '    |    |                                                              +' '    |    |     +----------------------------------------------------+   |' '    |    |     |                                                    |   |' '    |    |     |                                                    |   |' '    |    |     |                                                    |   |' '    |    |     |                                                    |   |' '    |    |     |                                                    |   |' "    |    |     |            $timeVar  <------+  Characters to replace!  |" '    |    |     |                                                    |   |' '    |    |     |     <--------------------------+                   |   |' '    |    |     |                                                    |   |' '    |    |     |                                                    |   |' '    |    |     |                                                    |   |' '    +XX--+     |                                                    |   |' '      XX |     +----------------------------------------------------+   |' '       XXX                                                              |' '         +--------------------------------------------------------------+' )

for i in "${lines[@]}"
do
    echo "$i"
done

while :
do
    local timeVar=$(date +"%T")
    #Replace the time in the strings printed above
    sleep 1
done
}

printThing