env_spark
env_spark is a point entity available in all 
GoldSrc games. It is used to create sparks at its origin.
Key Values
Targetname:
- Name
(targetname)<targetname> - The targetname that other entities refer to this entity by.
Angles:
- Pitch Yaw Roll (Y Z X)
(angles)<angle> - This entity's orientation in the world. Pitch is rotation around the Y axis, yaw is the rotation around the Z axis, roll is the rotation around the X axis.
- Max Delay
(MaxDelay)<string> - The longest delay between sparks (in seconds).
Flags
- [
32] : Toggle
- [
64] : Start ON
