bedrock-samples/resource_pack/animations/quadruped.animation.json

{
	"format_version" : "1.8.0",
	"animations" : {
		"animation.quadruped.walk" : {
			"anim_time_update" : "query.modified_distance_moved",
			"loop" : true,
			"bones" : {
				"leg0" : {
					"rotation" : [ "math.cos(query.anim_time * 38.17) *  80.0", 0.0, 0.0 ]
				},
				"leg1" : {
					"rotation" : [ "math.cos(query.anim_time * 38.17) * -80.0", 0.0, 0.0 ]
				},
				"leg2" : {
					"rotation" : [ "math.cos(query.anim_time * 38.17) * -80.0", 0.0, 0.0 ]
				},
				"leg3" : {
					"rotation" : [ "math.cos(query.anim_time * 38.17) *  80.0", 0.0, 0.0 ]
				}
			}
		}
	}
}