echo on several lines

Shell Programming and Scripting
1

Hi there,
I managed to write a script that display its progress like this:

~# cat myscript
echo -en '     Completed\015'
for (( i=0; i<=100; i++ )) do
    echo -ne $i'%\015'
    # perform some actions
    sleep .01
done
echo
~# myscript
100% Completed
~#

I can't show it on this post, but we visually see the percent growing from 0 to 100.
Now, I'd like to do something trickier. While the percent is still growing gently on line one, I'd like to display some results on the next lines, visually, I want to obtain something like this. For example. I launch a myscript at time T:

~$ myscript

At T+1 minut:

~$ myscript
20%  completed
  Action1
  Action2

At T+2 minuts:

~$ myscript
65%  completed
  Action1
  Action2
  Action3
  Action4

At T+3 minuts:

~$ myscript
100% completed
  Action1
  Action2
  Action3
  Action4
  Action5
  Action6
~$

Is it possible that my script keep modifying the first line (percentage) while echoing ActionX every once in a while?
Thanks for your help.
Santiago

2

I dont think so because it cant go to the next action until it completes the first.

3

Thanks chatwizrd,
Can you be more explicit, I don't really understand you. The point is not to do all the actions together but one after the other. After each action is completed, I want to display a certain percentage on line one.
For example, here is a script named icandothat:

~# cat icandothat
action1() { echo 'doing action1...'; sleep 3; }
action2() { echo 'doing action2...'; sleep 5; }
action3() { echo 'doing action3...'; sleep 2; }
echo '0%   completed'
action1
echo '30%  completed'
action2
echo '80%  completed'
action3
echo '100% completed'

Here is the result of this script at different times (left) compared to the result of a so called script icannotdothat (right). The script I would like to be able to write is the script on the right.
T=0

~# icandothat                 ~# icannotdothat
0%   completed                0%   completed
doing action1...              doing action1...

T=3 seconds

~# icandothat                 ~# icannotdothat
0%   completed                30%  completed
doing action1...              doing action1...
30%  completed                doing action2...
doing action2...

T=8 seconds

~# icandothat                 ~# icannotdothat
0%   completed                80%  completed
doing action1...              doing action1...
30%  completed                doing action2...
doing action2...              doing action3...
80%  completed
doing action3...

T=10 seconds

~# icandothat                 ~# icannotdothat
0%   completed                100% completed
doing action1...              doing action1...
30%  completed                doing action2...
doing action2...              doing action3...
80%  completed                ~#
doing action3...
100% completed
~#