how the frog do i code css

GRRRRRRR WOOF WOOF BARK BARK ARF ARF BARK WOOF WOOF GRRRRR SNARL SNARL HSSSSSSS GRRRRRRR WOOF BARK ARF BARK SNARL WOOF WOOF BARK ARF GRRRRRRR WOOF WOOF BARK BARK ARF ARF BARK WOOF WOOF GRRRRR SNARL SNARL HSSSSSSS GRRRRRRR WOOF BARK ARF BARK SNARL WOOF WOOF BARK GRRRRRR