{
    "format_version": "1.10.0",
    "particle_effect": {
        "description": {
        "identifier": "minecraft:crop_growth_emitter",
            "basic_render_parameters": {
                "material": "particles_alpha",
                "texture": "textures/particle/particles"
            }
        },
        "components": {
            "minecraft:emitter_initialization": {
                "creation_expression": "variable.size = Math.random(0.08, 0.14);"
            },            
            "minecraft:emitter_rate_instant": {
                "num_particles": "Math.random(12, 18)"
            },
            "minecraft:emitter_lifetime_once": {
                "active_time": 1
            },
            "minecraft:emitter_shape_box": {
                "half_dimensions": [0.4, 0.4, 0.4],
                "direction": [ "Math.random(-0.6, 0.6)", 0.6, "Math.random(-0.6, 0.6)" ]
            },
            "minecraft:particle_initial_speed" : 0.04,
            "minecraft:particle_motion_dynamic" : {},
            "minecraft:particle_lifetime_expression": {
                "max_lifetime": "2.0 + (Math.random(0.0, 4.0))"
            },
            "minecraft:particle_appearance_billboard": {
                "size": ["variable.size", "variable.size"],
                "facing_camera_mode": "rotate_xyz",
                "uv": {
                "texture_width": 128,
                    "texture_height": 128,
                    "uv": [16, 40],
                    "uv_size": [8, 8]
                }
            }
        }
    }
}