Iphone 4 brightness to low and i can't see anything?

I dropped the phone in the toliet then put it in rice for 24 hours and then it worked perfectly but then i accidently turned the brightness down so now i can't see anything i turned it off then back on and it shows the apple logo (from when you turn it on) like how its supposed to be but after that i can't see anything and i know its on because i hold the home button and voice control turns on please help

Try, when on your lock screen pushing the screen up ^ you should come to a page that shows a bunch of different controls. There will be a line with a circle and then a long line with a dot and then at the end a sun, that's your brightness adjustor

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