{
  "format_version": "1.10.0",
  "particle_effect": {
    "description": {
      "identifier": "minecraft:silverfish_grief_emitter",
      "basic_render_parameters": {
        "material": "particles_alpha",
        "texture": "textures/particle/particles"
      }
    },
    "components": {
      "minecraft:emitter_rate_instant": {
        "num_particles": 20
      },        
      "minecraft:emitter_lifetime_once": {
      },
      "minecraft:emitter_shape_custom": {
        "offset": [ "variable.aabb.x * Math.random(0, 2) - Math.random(0, 0.2) - variable.aabb.x", 
                    "variable.aabb.y * Math.random(0, 1) - Math.random(0, 0.2)", 
                    "variable.aabb.z * Math.random(0, 2) - Math.random(0, 0.2) - variable.aabb.z" ],
        "direction": [ "Math.random(0, 0.02)", "Math.random(0, 0.02)", "Math.random(0, 0.02)" ]                      
      },
      "minecraft:particle_initial_speed": 2,
      "minecraft:particle_lifetime_expression": {
        "max_lifetime": "4 / Math.Random(1, 5) + 0.1"
      },
      "minecraft:particle_motion_dynamic": {
        "linear_acceleration": [ 0, 4, 0 ],
        "linear_drag_coefficient": 5.25
      },
      "minecraft:particle_motion_collision": {
        "coefficient_of_restitution": 0.1,
        "collision_drag": 10.0,
        "collision_radius": 0.1
      },
      "minecraft:particle_appearance_billboard": {
        "size": [ "variable.particle_random_1 * variable.particle_random_2 * 0.6 + 0.1", "variable.particle_random_1 * variable.particle_random_2 * 0.6 + 0.1" ],
        "facing_camera_mode": "lookat_xyz",
        "uv": {
          "texture_width": 128,
          "texture_height": 128,
          "flipbook": {
            "base_UV": [ 56, 0 ],
            "size_UV": [ 8, 8 ],
            "step_UV": [ -8, 0 ],
            "frames_per_second": 8,
            "max_frame": 8,
            "stretch_to_lifetime": true,
            "loop": false
          }
        }
      },
      "minecraft:particle_appearance_tinting": {
        "color": [ "variable.particle_random_1 * 0.3 + 0.7", "variable.particle_random_1 * 0.3 + 0.7", "variable.particle_random_1 * 0.3 + 0.7", 0 ]
      },
      "minecraft:particle_appearance_lighting": {}
    }
  }
}