1 #!/bin/bash
  2 for ((i=1;i<=10;i++))
  3 do
  4   for ((j=10;j>=$i;j--))
  5   do
  6   echo -n " "
  7   done
  8 
  9   for ((k=1;k<=$i;k++))
 10   do
 11   echo -n "*"
 12   done
 13 
 14   for ((y=2;y<=$i;y++))
 15   do
 16   echo -n "*"
 17   done
 18 
 19 echo ""
 20 
 21 done
 22 
 23 for ((i=1;i<=9;i++))
 24 do
 25   for ((j=0;j<=$i;j++))
 26   do
 27   echo -n " "
 28   done
 29 
 30   for ((k=9;k>=$i;k--))
 31   do
 32   echo -n "*"
 33   done
 34 
 35   for ((y=8;y>=$i;y--))
 36   do
 37   echo -n "*"
 38   done
 39   echo ""
 40 done