my character has a elemental sword and i want it whenever i press key_1 for example,the particle attached to it will change to fire like particle or when i press key_2 it will change to ice like particle.i got all the particle i needed(fire,ice,wind and earth),the problem is i need to hold the 1 on my keyboard to keep the fire particle running and when i release it the particle will disappear..

thanks in advance...