How to use OV7670 and SD card module on Arduino UNO,and get a colorful image?

I read this article : https://hkalasua.wordpress.com/2017/09/11/ov7670-arduino-sd
and I want to achieve it,but I can't get a colorful image,I search the way on Google,
but I didn't have any way to achieve it...

Who can help me?

(Sorry,my English not well,I'm only a Junior High School second grade student,I'm a Taiwanese...)