How to import and plot data from a series of similar text files

I have about 500 text files each of them contains numeric data of same type. I could import the entire dataset from one file and plot the data of column 1 vs. data of column 7 by using the following script:

A=importdata('file1.txt');
ALT=A.data(:,1);
ED=A.data(:,7);
plot(ED,ALT);

Now I need to get separate plots of column 1 vs. column 7 of all the 500 files. How can I get it?

However, now I placed all the files in a directory and used the following script to read the file names:

filesFolder = 'nameoffolder/';
allTextFiles = dir([filesFolder,'*.txt']);
numberOfTextFiles = numel(allTextFiles);
nameOfTextFiles = {allTextFiles.name};

Now need to read those files one by one.