chili source for soto

The garlicky Kicap Cili hot chilli soy sauce, also known as Kicap Cili. It is a simple blend of chillies, bird's eye chillies, garlic, sweet soy sauce, and lime juice.

http://annieliciousfood.blogspot.com/2013/03/soto-johor-mee-soto-mff-johor-3.html

For Spicy Black Chilli Sauce
4 Red Chillies
3 Green Chillies
3 Red Bird's Eye Chillies
2 Green Bird's Eye's Chillies
1 Clove Garlic
100ml Sweet Soy Sauce (Kicap Manis)
1 Lime, extract the juice
1 tsp Sugar
1 tsp Salt 

This is really easy. Just remove the seeds from the chillies, mix all the ingredients together in a blender and blend it away!