In your bashrc, search for the line "PS1", that is where you change the prompt. To change the second line, you change PS2.
Before those lines somewhere, paste this in:
# ANSI color codes
RS="\[\033[0m\]" # reset
HC="\[\033[1m\]" # hicolor
UL="\[\033[4m\]" # underline
INV="\[\033[7m\]" # inverse background and foreground
FBLK="\[\033[30m\]" # foreground black
FRED="\[\033[31m\]" # foreground red
FGRN="\[\033[32m\]" # foreground green
FYEL="\[\033[33m\]" # foreground yellow
FBLE="\[\033[34m\]" # foreground blue
FMAG="\[\033[35m\]" # foreground magenta
FCYN="\[\033[36m\]" # foreground cyan
FWHT="\[\033[37m\]" # foreground white
BBLK="\[\033[40m\]" # background black
BRED="\[\033[41m\]" # background red
BGRN="\[\033[42m\]" # background green
BYEL="\[\033[43m\]" # background yellow
BBLE="\[\033[44m\]" # background blue
BMAG="\[\033[45m\]" # background magenta
BCYN="\[\033[46m\]" # background cyan
BWHT="\[\033[47m\]" # background white
This way, if you want to change something's background to white, you don't need to type in \[\033[47m\], just BWHT
Check out
this link to see what the prompt escapes are (and for much more detailed info of bash prompts), and lastly here's mine:
PS1="$HC$FBLE┌─ $HC$FYEL\u: $RS\w\n$HC$FBLE└─ $RS"
PS2="$FRED> $RS$HC$FMAG"
If you have more questions, just ask, and I'll answer if I can