How to make a minecraft default texture pack

gistfile1.sh

# unzip minecraft.jar

mkdir minecraft_jar
cd minecraft_jar
cp ~/Library/Application\ Support/minecraft/bin/minecraft.jar ./
unzip minecraft.jar

# copy resources

mkdir ../default-texture-pack
echo 'Default Texture Pack!!' > ../default-texture-pack/pack.txt
cp ./terrain.png ../default-texture-pack
cp ./particles.png ../default-texture-pack
cp ./pack.png ../default-texture-pack
cp -rf ./achievement ../default-texture-pack
cp -rf ./armor ../default-texture-pack
cp -rf ./art ../default-texture-pack
cp -rf ./environment ../default-texture-pack
cp -rf ./font ../default-texture-pack
cp -rf ./gui ../default-texture-pack
cp -rf ./item ../default-texture-pack
cp -rf ./misc ../default-texture-pack
cp -rf ./mob ../default-texture-pack
cp -rf ./terrain ../default-texture-pack
cp -rf ./title ../default-texture-pack