if [ -e gl_3d_basics.zip ]; then
    chmod +w gl_3d_basics.zip
fi

zip -q gl_3d_basics.zip \
    gl_shaders.py \
    progra_import.py \
    progra_module_exemple.py \
    vecutils.py player.png \
    gl_matrices_and_interpolation.py \
    gl_textures.py \
    pygame0_code_minimal.py \

chmod -w gl_3d_basics.zip