Display String in Bold,Italic and Underline and Blinking in Linux Shell Scripts

echo "enter Any String:->";
read strvalue

echo "1:Display String In Bold";
echo "2:Display String In UnderLine";
echo "3:Display String In Blinking";

echo "Enter The Choice:->";
read c
if ((c==1))
then
    printf "\033[7m $strvalue";

elif ((c==2))
then
    printf "\033[4m $strvalue";

elif ((c==3))
then
    printf "\033[5m $strvalue";
fi