callFunction awiat is not work

async battleStart(){
		this.f_runtime.globalVars.isAttack = true;
		var tempHp = this.f_runtime.globalVars.hp;
		var tempEnemyHp = this.f_runtime.globalVars.enemy_hp;
		
		for(var i = 0; i < 20; i++){
			// 0.1초마다 상대체력의 5%의 데미지를 받는다...
			this.f_runtime.globalVars.hp -= tempEnemyHp/20;
			this.f_runtime.globalVars.enemy_hp -= tempHp/20;
			if(this.f_runtime.globalVars.hp <= 10) {
				await this.f_runtime.callFunction("warningHp");
// 				await sleep(2000);
			}
			if(this.f_runtime.globalVars.hp <= 0 || 
			 this.f_runtime.globalVars.enemy_hp <= 0) {
				this.f_runtime.callFunction("endBattle");
				break;
			}
			await sleep(100);
		}
		this.f_runtime.globalVars.isAttack = false;
		
	}