hi ... i can't start minecraft... i have logo of minecraft but no name and i have white page.... 1 h later it's the same... can you help me for that please ?

hi ... i can't start minecraft... i have logo of minecraft but no name and i have white page.... 1 h later it's the same... can you help me for that please ? oh... and If my writing is bad it is that i'm french ^^ my username on minecraft is FnTk_AtOmZz and if you want my e-mail, tell me