I'm having trouble in the fill_solid function with arrays. can you help give color to row3.

int row3[]={1,2,3};
uint8_t sizerow3 = sizeof(row3)/sizeof(row3[0]);

void solid(){
fill_solid(leds[row3[3]], sizerow3, CRGB :: Red);
LEDS. show();
}

this is my complete program.
[https://pastebin.com/6erFAmRy][1]
 
Thank you