Hi everyone. Could anyone write me the code or just say where should I start to make a scoring system in which there are 7 leds and one button. First button press should light up one led, second button press lit up another one but leave the previous one lit and so on. And there should be a rest button. I made a gif to illustrate what I mean. Thanks in advance. 
[url=http://[](Animated GIF - Imgflip)
yeah forgot to mention what i need help with.