New Composition

// Create a new 4K composition (3840x2160)
// adapt the elements below for your personal specs

var compWidth = 3840;
var compHeight = 2160;
var compDuration = 300; // Duration in seconds (300 = 5 minutes)
var compFrameRate = 30; // Frame rate

// Create the composition
var newComp = app.project.items.addComp("4K_Comp", compWidth, compHeight, 1, compDuration, compFrameRate);

// Set the background color (optional)
newComp.bgColor = [0, 0, 0]; // Black background

// Prompt the user for the composition name
var compName = prompt("Enter the name for the new composition:", "4K_Comp");

// Rename the composition with the user-provided name
if (compName !== null && compName !== "") {
   newComp.name = compName;
}

// Open the composition in the viewer
newComp.openInViewer();