varying highp vec2 textureCoordinate;
varying highp vec2 textureCoordinate2;

uniform sampler2D inputImageTexture;
uniform sampler2D inputImageTexture2;

void main()
{
  lowp vec4 textureColor = texture2D(inputImageTexture, textureCoordinate);
  lowp vec4 textureColor2 = texture2D(inputImageTexture2, textureCoordinate);
  
  gl_FragColor = mix(textureColor, textureColor2, textureColor2.a);
}