purposefully make things stairstepped ...

gistfile1.txt

#!/bin/bash

while true
do
    for i in $(seq 0 $(tput cols))
    do
        for j in $(seq 0 $i)
        do
            echo -n " "
        done

        echo $1
    done

done

!/bin/bash

this reads stdin

read line
while true
do
for i in $(seq 0 $(tput cols))
do
for j in $(seq 0 $i)
do
echo -n " "
done
echo $line
sleep 1
done
done