Hi, I want to change my texture after a certain time. How do I make 2 textures and switch them ? I've added this to core.frag

uniform sampler2D ourTexture1;

uniform sampler2D ourTexture2;

uniform int usetexture = 0;

void main() {

if (usetexture == 0) color = texture(ourTexture1, TexCoord);

if (usetexture == 1) color = texture(ourTexture1, TexCoord);

}