bedrock-samples/resource_pack/particles/falling_border_dust.json

{
  "format_version": "1.10.0",
  "particle_effect": {
    "description": {
      "identifier": "minecraft:falling_border_dust_particle",
      "basic_render_parameters": {
        "material": "particles_alpha",
        "texture": "textures/particle/particles"
      }
    },
    "components": {
      "minecraft:emitter_rate_manual": {
        "max_particles": 100
      },      
      "minecraft:emitter_lifetime_expression": {
        "activation_expression": 1,
        "expiration_expression": 0
      },
      "minecraft:emitter_shape_point": {
      },
      "minecraft:particle_initial_speed": [ "Math.random(-0.016, 0.016)", "Math.random(-0.2, -0.6)", "Math.random(-0.016, 0.016)" ],
      "minecraft:particle_lifetime_expression": {
        "max_lifetime": "(8 / math.random(0.0001, 20.0)) + 0.5"
      },
      "minecraft:particle_motion_dynamic": {
        "linear_acceleration": [ 0, "-1 / (math.clamp(variable.particle_random_4, 0.4, 0.8) * 6)", 0 ]
      },
      "minecraft:particle_appearance_billboard": {
        "size": [ "variable.particle_random_3 * 0.075 + 0.075", "variable.particle_random_3 * 0.075 + 0.075" ],
        "facing_camera_mode": "lookat_xyz",
        "uv": {
          "texture_width": 128,
          "texture_height": 128,
          "flipbook": {
            "base_UV": [ 64, 72 ],
            "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 * 0.2 + 0.8) * (variable.particle_random_2 * 0.4 + 0.6)", 0.0, 0.0, 0.0 ]
      },
      "minecraft:particle_appearance_lighting": {}
    }
  }
}