Can someone help me about the red roads in sentenel tower , couldn't figure anything out
Best advice I can give you for that section is to turn off the "Lights and Shadows" effects in the game options. Takes away from the spooky atmosphere but makes it much easier to see the map.
My memory of that area is a little hazy but as I recall, you find a lever piece early in the map, you might need to search some cabinets for some keys to get through the locked gates. Eventually you'll find somewhere to put the lever piece which will open a gate, inside you'll meet a boy there who will follow you. Then, I think you had to head south-east and you will meet Alex (a girl with pink hair and claws), then just keep exploring the map and interacting with things and you'll figure it out. Hope that helps!