How can we add a banner in NetSuite

require(["N/ui/message"], function(message_1){

var messagePrompt = message_1.create({
    title: "Foo",
    message: "BAR",
    duration: 5000,
    type: message_1.Type.ERROR
});

messagePrompt.show();
});

Available types:
Type {
    CONFIRMATION, // A green background with a checkmark icon.
    INFORMATION,  // A blue background with an Information icon.
    WARNING,      // A yellow background with a Warning icon.
    ERROR,        // A red background with an X icon.
}

Navigate to SETUP > COMPANY > COMPANY INFORMATION and select the desired file from your file cabinet as the COMPANY LOGO. Make sure to select DISPLAY LOGO INTERNALLY  as well.