var callback   = function( geometry ) { createMesh(geometry);

loader.load( "Models/sculp.js", callback );

function createMesh(geometry){

    inArr[id] = new THREE.Mesh( geometry, new THREE.MeshLambertMaterial( { color: 0xbbbbbb} ) );
    inArr[id].scale.set( 100, 100, 100 );
    scene.add( inArr[id] );
    id++;
}

var onKeyDown = function(event) {
  if (event.keyCode == 67) { // when 'c' is pressed
    object.material.color.setHex(0xff0000); // there is also setHSV and setRGB
  }
};
document.addEventListener('keydown', onKeyDown, false);